Staff Profile

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Michael Dillon

Curator Emeritus

Negaunee Integrative Research Center

Michael Dillon was Curator of Flowering Plants at the Museum for 30 years until his retirement in 2008. Over those three decades Dillon became one of the world’s leading experts on the plants of Peru, as well as the effects of El Niño events on neotropical plant populations.  He has published more than 100 scientific papers, and described dozens of new species, principally plants of Peru and Chile. Between 2005 and 2008 Dillon was Chair of the Department of Botany, overseeing a major upgrade of The Field Museum Herbarium and botanical labs (supported by the Searle Foundation), and spearheading pioneering efforts in collections digitization (supported by the National Science Foundation and the Mellon Foundation) that continue today.

With National Geographic Society and National Science Foundation financial support, Dillon with his Peruvian and Chilean colleagues has conducted botanical inventories in a wide variety of habitats, including the Atacama and Peruvian coastal deserts, montane forests, high jungle forests (selva alta), and high-elevation páramos.  During these many projects, Dillon has been a close collaborator and mentor to many South American colleagues, fostering scientific discovery and teaching generations of scientists in Peru and Chile. In recognition of his collaborations and contributions Dillon has been named honorary professor at four Peruvian universities.  In 2001, the Universidad Nacional de San Agustín launched a scientific journal in his honor—Dilloniana.  In 2013 a group of colleagues in Arequipa, Peru created a new research institute, “Instituto Científico Michael Owen Dillon" (IMOD) (, dedicated to interdisciplinary studies of biodiversity, and to improving the Peruvian peoples’ quality of life through the appropriate use of natural and cultural resources. 


Colleagues have named over a dozen species of plants in his honor and his collections have served as types for many more species new to science. Although nominally retired, “Dillon of the Andes” (as he was dubbed by colleagues at the Smithsonian in 2001) continues to conduct fieldwork and publish.


Additional Information


  • B.A.   University of Northern Iowa - 1969
  • M.A.   University of Northern Iowa - 1972
  • Ph.D.  University of Texas at Austin - 1976



  • ENSO events and effects of El Niño on terrestrial vegetation
  • Systematics of Neotropical Asteraceae (Gnaphalieae & Liabeae)
  • Systematics of Nolana (Nolanae-Solanaceae)
  • Floras of Chile, Ecuador, Bolivia, and Peru
  • Coastal South American Ecology and Biogeography
  • North/South American Amphitropic Disjunctions
  • Páramos, Floristic Inventories & Specimen Databases

Grants & awards


  • National Science Foundation: “Digital Access to the Field Museum’s Neotropical plant types collection” with B. Alverson, C. Niezgoda, & J. McCaffrey (Co-PIs). BRC-0447285 (Funded: 2005-2007)
  • National Science Foundation: “Phylogenetic Systematics of Nolana (Solanaceae) and Biogeographic Implications for the Atacama and Peruvian Deserts” with J. Wen (Co-PI) DEB-0415573 (Funded: 2004-2007)
  • National Science Foundation: “Floristic Inventory of the Jalca Formations of Northern Peru” DEB-BSI-0071506 (Funded: 2000-2003)
  • National Science Foundation: “Small Grants for Experimental Research (SGER): Botanical Collecting and Ecological Observations in Coastal South American Deserts during the 1997/98 ENSO Event” (Funded: 1997-1999)
  • National Geographic Society: Floristic Inventory of the Bosque de Protección del Río Alto Mayo. (Funded: 1997-1999)
  • National Geographic Society: Floristic Inventory of Humid Upper Montane Forests of Northern Peru. (Funded: 1991-1993)
  • Fellowship Visit supported by Tokyo Metropolitan University, Japan (1-16 May 1994)
  • National Science Foundation:  Biogeography and Evolution of the Lomas Formations of Peru and Chile. BSR-8513205. (Funded: 1986-1989)
  • National Science Foundation:  Scientific Visit for Research Participation on Flora of Peru Project, 1985. INT-8512104. (Funded: 1985-1986)
  • National Geographic Society: The Botanical Response of Andean Desert Lomas Formations to the 1982-83 El Niño Meteorological Perturbation. (Funded: 1983-84)
  • National Science Foundation: Flora of Peru Project, 1979-1981 (Researcher)
  • National Endowment to the Arts: Collection Curation and Maintenance, Missouri Botanical Garden, 1977-1978
  • National Science Foundation: Predoctoral Dissertation Improvement Grant, 1973-1974



  • Mellon Foundation: Digitization of Field Museum Type Collections
  • Chicago Community Trust/Searle Family Foundation: Compactorization of Field Museum’s Flowering Plant Herbarium. (Funded: 2004-2006)
  • National Science Foundation: Collection Service Activities for the Field Museum Herbarium. (Funded: 1994-1999)
  • American Orchid Society: Microscope for Illustration of the Orchids of Northern Peru (Funded: Jun 1999)



Scientific Publications:

1. Dillon, M.O. 1976. Two new species of Flourensia (Asteraceae-Heliantheae) from north-central Mexico.  Southwestern Naturalist 21: 145-149.

2. Rodriguez, E., M.O. Dillon, T.J. Mabry, G.H.N. Towers & J.C. Mitchell. 1976. Dermatologically active sesquiterpene lactones in trichomes of Parthenium hysterophorus L. (Compositae).  Experientia 32: 236-237.

3. Dillon, M.O., T.J. Mabry, E. Besson, M.L. Bouillant & J. Chopin. 1976.  New flavonoids from Flourensia cernua. Phytochemistry 15: 1085-1086.

4. Dillon. M.O. & T.J. Mabry. 1977. Flavonoid aglycones from Flourensia (Asteraceae-Heliantheae). Phytochemistry 16: 1318-1319.

5. Dillon, M.O. & W. G. D’Arcy. 1978. New or noteworthy Asteraceae from Panama.  Ann. Missouri Bot. Gard. 65: 766-768.

6. Dillon, M.O. 1979. Chromosome reports for Asteraceae.  Taxon 28: 278-279.

7. Dillon, M.O. & B.L. Turner. 1980. Chromosome reports for Krameriaceae and Solanaceae. Taxon 29: 534.

8. Dillon, M.O. 1980. Compositae: Introduction to Family, In: J.F. Macbride & Collaborators, Flora of Peru, Fieldiana: Botany, N.S. 5, 12-21.

9. Dillon, M.O. 1981.  Acosmium, Aeschynomene, Alysicarpus, Ateleia, Chaetocalyx, Dussia, Myroxylon, Ormosia, Sophora, Stylosanthes and Zornia, In: J. D. Dwyer & Collaborators, Flora of Panama, Part V. Leguminosae subfamily Papilionoideae.  Ann. Missouri Bot. Gard. 67: 537-553, 579-582, 678-681, 735-743, 766-768, 773-776, 804-808.

10. Dillon, M.O. 1981. Three new species of Flourensia (Asteraceae-Heliantheae) from South America.  Ann. Missouri Bot. Gard. 68: 104-110.

11. Dillon, M.O. 1981. Family Compositae: Part II. Tribe Anthemideae. In: J. F. Macbride & Collaborators, Flora of Peru, Fieldiana: Botany, N.S. 7, 1-21.

12. Dillon. M.O. 1982. Family Compositae: Part IV. Tribe Cardueae. In: J. F. Macbride & Collaborators, Flora of Peru, Fieldiana: Botany, N.S. 10, 1-8.

13. Dillon, M.O. 1982. Family Compositae: Additions to the Tribe Vernonieae. In: J. F. Macbride & Collaborators, Flora of Peru, Fieldiana: Botany, N.S. 11, 1-7.

14. Dillon, M.O. & B.L. Turner. 1982. Chromosome Numbers of Peruvian Compositae. Rhodora 84: 131-137.

15. Dillon, M.O. 1983. A New Species of Bidens (Heliantheae-Asteraceae) from Guatemala. Phytologia 54: 225-227.

16. Dillon, M.O. 1984. A Systematic Study of Flourensia (Asteraceae, Heliantheae). Fieldiana: Botany, N.S. 16, 1-67.

17. Dillon, M.O. 1984. Two New Species of Vernonia (Asteraceae: Vernonieae) from Peru. Brittonia 36: 333-336.

18. Dillon, M.O. 1984. A new combination in Ambrosia (Heliantheae-Asteraceae) from Peru. Phytologia 56:337-338.

19. Dillon, M.O & A. Sagástegui A. 1985. Four New Species of Asteraceae from Peru. Brittonia 37: 6-13.

20. Dillon, M.O. & A. Sagástegui A. 1985. New species and combinations in Belloa (Inuleae-Asteraceae). Phytologia 58: 392-400.

21. Dillon, M.O. & A. Sagástegui A. 1986. New Species and Status Changes in Andean Inuleae (Asteraceae). Phytologia 59: 227-233.

22. Dillon, M.O. 1986. A New Species of Flourensia (Asteraceae, Heliantheae) from Northern Peru. Brittonia 38: 32-34.

23. Dillon, M.O. &  A. Sagástegui A. 1986. Jalcophila, a new genus of Andean Inuleae (Asteraceae). Brittonia 38: 162-167.

24. Dillon, M.O. & A. Sagástegui A. 1986. A New Species of Achyrocline (Inuleae-Asteraceae) from Peru.  Phytologia  60: 107-110.

25. Sundberg, S. & M.O. Dillon. 1986. Chromosome Reports.  Taxon 35: 409-410.

26. Dillon, M.O. & A. Sagástegui A. 1986. A New Species of Monactis (Heliantheae-Asteraceae) From Northern Peru.  Phytologia 61: 5-8.

27. Jakupovic, J., V.P. Pathak, F. Bohlmann, D. Gage, & M.O. Dillon. 1986. Sesquiterpene Lactones from Helogyne hutchisonii. Phytochemistry 25: 2563-2565.

28. Jakupovic, J. & M.O. Dillon. 1986. Further constituents from Pluchea species. Die Pharmazie 41(11): 821-822.

29. Zdero, C., F. Bohlmann, M.O. Dillon. 1988: Helogynic acid, a homoditerpene, and other constituents from Helogyne apaloidea. Phytochemistry 27: 616-21.

30. Jakupovic, A. Schuster, F. Bohlmann, & M.O. Dillon. 1988. Lumiyomogin, ferreyrantholide, fruticolide and other sesquiterpene lactones from Ferreyranthus fruticosus, Phytochemistry 27: 1113-1120.

31. Jakupovic, J., A. Schuster, F. Bohlmann, M.O. Dillon. 1988. Guaianolides and other constituents from Liabum floribundum, Phytochemistry 27: 1771-5.

32. Dillon, M.O. & A. Sagástegui A. 1988. Additions to the South American Senecioneae (Asteraceae). Brittonia 40: 221-228.

33. Dillon, M.O & A. Sagástegui A. 1988. Two new species of Llerasia (Astereae-Asteraceae) from Peru. Brittonia 40: 363-367.

34. Jakupovic, J., M. Jaensch, F. Bohlmann, & M.O. Dillon. 1988. Eudesmanolides, 5,10-bis-epi-eudesmanes and oplopanone derivatives from Ambrosia artemisioides, Phytochemistry 27: 3551-3556.

35. Dillon, M.O. & A. Sagástegui A. 1989. A new species of Symplocos (Symplocaceae) from northern Peru. Brittonia 41: 32-34.

36. Dillon, M.O. & P. W. Rundel. 1990. The botanical response of the Atacama and Peruvian Desert Flora to the 1982-83 El Niño event. Pps. 487-504. In: P. W. Glynn (ed.), Global Ecological Consequences of the 1982-83 El Niño- Southern Oscillation, Elsevier Science Publishers, New York.

37. Dillon, M.O. & A. Sagástegui A. 1990. Oligandra Less. revisited and the need for a new genus, Pseudoligandra (Asteraceae: Inuleae). Taxon 39:125-128.

38. Constance, L. & M.O. Dillon. 1990. A new peltate Hydrocotyle (Umbelliferae) from Northern Peru.  Brittonia 42: 257-259.

39. Bohlmann, F., M. Grenz, H.M.Niemeyer & M.O.Dillon. 1990. A lignane derivative from Lucilia nivea. Rev. Latinoamer. Quím 21: 75-76.

40. Turner, B.L. & M.O. Dillon. 1991. Crossothamnus pascoanus (Asteraceae-Eupatorieae), a new species from Pasco, Peru.  Phytologia 69: 420-423.

41. Rundel, P.W., M.O. Dillon, B. Palma, H. A. Mooney, S. L. Gulmon, & J. R. Ehleringer. 1991. The phytogeography and ecology of the coastal Atacama and Peruvian Deserts. Aliso 13(1): 1-49.

42. Dillon, M.O. & A. Sagástegui A. 1991. Family Asteraceae: Part V. Tribe Inuleae. In: J. F. Macbride & Collaborators, Flora of Peru, Fieldiana: Botany, N.S. 26, 1-70.

43. Dillon, M.O. 1991. A New Species of Tillandsia (Bromeliaceae) from the Atacama Desert of Northern Chile.  Brittonia 44: 11-16.

44. Sagástegui-A., A. & M.O. Dillon. 1991. Inventario Preliminar de la Flora del Bosque Monteseco (Cajamarca, Peru).  Arnaldoa 1: 35-52.

45. Dillon, M.O. & A. Sagástegui A. 1991. Sinopsis de los Géneros de Gnaphaliinae (Asteraceae-Inuleae) de Sudamerica. Arnaldoa 1(2): 5-91.

46. Dillon, M.O. & N. Hensold. 1993. Family Asteraceae. In: L. Brako & J. L. Zarucchi. Catalogue of the Flowering Plants and Gymnosperms of Peru. Monogr. Syst. Bot. Missouri Bot. Gard. 45: 103-189.

47. Dillon, M.O. 1993. Análisis florístico del Bosque Monteseco (Cajamarca, Perú) e implicancias para su conservación. Arnaldoa 1(3): 45-63.

48. Sagástegui-A.,A. & M.O. Dillon. 1993. Una Nueva especies de Trixis (Mutisieae-Asteraceae) del norte del Peru. Arnaldoa 1(3): 9-13.

49. Dillon, M.O. & M. Muñoz-Schick. 1993. A Revision of the Dioecious Genus Griselinia (Griseliniaceae), Including a New Species from the Coastal Atacama Desert of Northern Chile. Brittonia 45: 261-274.

50. Hanson, A.D., B. Rathinasabapathi, J. Rivoal, M. Burnet, M.O. Dillon & D. A. Gage. 1994.Osmoprotective compounds in the Plumbaginaceae: A natural experiment in metabolic engineering of stress tolerance. Proc. Natl. Acad. Sci. 91: 306-310.

51. Dillon, M.O. 1994. Bosques Húmedos del Norte del Perú.  Arnaldoa 2(1): 29-42.

52. Dillon, M.O. & A. Sagástegui A. 1994. Estudios en la Tribu Liabeae (Asteraceae) en Peru: I. Revisión de Ferreyranthus. Arnaldoa 2(2): 7-23.

53. Dillon, M.O. & A. Sagástegui A. 1994. Estudios en la Tribu Liabeae (Asteraceae) en Peru: II. Una nueva especie de Oligactis procedente del Norte del Perú y Sur del Ecuador. Arnaldoa 2(2): 25-30.

54. Sagástegui-A., A. & M.O. Dillon.1994. Estudios en la Tribu Liabeae (Asteraceae) en Peru: III. Una nueva especie de Chrysactinium del Norte del Perú. Arnaldoa 2(2): 31-35.

55. Dillon, M.O. A. Sagástegui A. , I. Sánchez V. , S. Llatas Q., N. C. Hensold. 1995. Floristic Inventory and Biogeographic Analysis of Montane Forests in Northwestern Peru. Pp. 251-270. In: Biodiversity and Conservation of Neotropical Montane Forests, The New York Botanical Garden, Bronx, NY.

56. Sagástegui-A., A., S. Leiva G., P. Lezama, N. Hensold & M.O. Dillon. 1995. Inventario preliminar de la Flora del Bosque Cachil (Cajamarca, Perú). Arnaldoa 3(2): 19-34.

57. Funk, V.A., H. Robinson, & M.O. Dillon 1994.  Liabeae: Taxonomy, Phylogeny and Biogeography. Pp. 545-567. In: D.J.N. Hind & H.J.  Beentje (eds.). Compositae: Systematics. Proceedings of the International Compositae Conference, Kew.  Vol. 1.1996.  Royal Botanic Gardens, Kew.

58. Dillon, M.O. & A. Sagástegui A. 1996. Revision of the dioecious genus Chersodoma Phil. (Senecioneae, Asteraceae), including a new species and status change.  Brittonia 48: 582-604.

59. Vision, T.J. & M.O. Dillon. 1996. Sinopsis de Senecio L. (Senecioneae, Asteraceae) para el Perú. Arnaldoa 4(1): 23-46.

60. Dillon, M.O. 1997. Lomas Formations-Peru. Pp. 519-527. In: S. D Davis, V. H. Heywood, O. Herrera-McBryde, J. Villa-Lobos and A. C. Hamilton (eds.), Centres of Plant Diversity, A Guide and Strategy for their Conservation. WWF, Information Press, Oxford, U.K.

61. Dillon, M.O. &  A. E. Hoffmann-J. 1997. Lomas Formations of the Atacama Desert, Northern Chile. Pp. 528-535. In: S. D Davis, V. H. Heywood, O. Herrera-McBryde, J. Villa-Lobos and A. C. Hamilton (eds.), Centres of Plant Diversity, A Guide and Strategy for their Conservation. WWF, Information Press, Oxford, U.K.

62. Rundel, P.W., B. Palma, M.O. Dillon, M.R. Sharifi, E.T. Nilsen, K. Boonpragob. 1997. Tillandsia landbeckii in the coastal Atacama Desert of northern Chile. Revista Chilena de Historia Natural 70: 341-348.

63. Rundel, P.W., B. Palma, & M.O. Dillon. 1996. Flora and Vegetation of Pan de Azúcar National Park in the Atacama Desert of Northern Chile. Gayana Bot. 53(2): 295-315.

64. Dillon, M.O. 1997. Rol de INTERNET en la Crisis de la Biodiversidad,  In Simposio: Estrategias para Bioconservacion en el  Norte del Peru. Arnaldoa 4(2): 93-121.

65. Sagástegui-A.,A. & M.O. Dillon. 1998.Una nueva especie de Critoniopsis (Vernonieae: Asteraceae) de Cajamarca, Perú. Arnaldoa 5(1): 19-24.

66. Dillon, M.O. & A. Sagástegui A. 1998.Una breve revisión del género Vernonia (sensu lato) del Perú. Arnaldoa 5(1): 25-33.

67. Dillon, M.O. & A. Sagástegui A. 1998. Una nueva especie de Chrysophyllum (Sapotaceae) con frutos comestibles del noroeste de Perú. Arnaldoa 5(1): 67-75.

68. Rundel, P. & M.O. Dillon. 1998. Ecological patterns in the Bromeliaceae of the lomas formations of Coastal Chile and Peru. Plant Syst. Evo. 212: 261-278. 1998.

69. Dillon, M.O. & A. Sagástegui A.1999. Caxamarca, a new monotypic genus of Senecioneae (Asteraceae) for Northern Peru. Novon 9: 156-161.

70. Dillon, M.O., A. Sagástegui A., I. Sánchez V., S. Leiva G., & P. Lezama A. 1999. Diversidad Floristica del Norte de Perú - Tomo I. Pp. 228. Trujillo, Peru.

71. Tago-Nakawaza, M. & M.O. Dillon. 1999 (2000).Biogeografía y Evolución en el Clado Nolana (Solaneae-Solanaceae). Arnaldoa 6(2): 81-116.

72. Dillon, M.O. & C. Trujillo C. 2000. A new record of Lobelia anceps (Campanulaceae) in northern Chile. Chloris Chilensis. URL:


73. Dillon, M.O. 1994-2010. Andean Botanical Information System Webpage - URL: <>

74. Dillon, M.O. 2010. LOMAFLOR, Searchable Database. <URL:>

75. Dillon, M.O. 2000. Family Asteraceae, Achillea, Achyrocline, Agyranthemum, Blumea, Chaptalia Cirsium, Dendranthema, Gamochaeta, Gerbera, Gnaphalium,  Liabum,  Lycoseris, Matricaria, Onoseris, Pluchea, Sinclairia, Trixis. Pp. 271-280; 281, 281-282, 292, 298-299, 303-304, 305- 306, 311-312, 331, 332, 332-334, 339, 340, 340-341, 349, 358, 369-370, 381. In: W.D. Stevens, C. Ulloa C., A. Pool, O. M. Montiel (eds.) Flora de Nicaragua. Monographs in Systematic Botany 85, Tomo 1, Missouri Botanical Garden, St. Louis.

76. Sánchez-V., I. & M.O. Dillon. 2000 (2001).Una nueva especie de Mikania (Eupatorieae: Asteraceae) de Piura, Perú. Arnaldoa 7(1-2): 7-12.

77. Dillon, M.O. 2000. Classification and phylogeny of the South American Gnaphalieae (Asteraceae). Andean Botanical Information System. URL:

78. Ulloa-U., C., P. M. Jørgensen, & M.O. Dillon. 2002. Arnaldoa argentea (Barnadesioideae: Asteraceae), a new species and a new generic record for Ecuador. Novon 12: 415-419.

79. Dillon, M.O. & A. Sagástegui A. 2001. Tribal classification and diversity in the Asteraceae of Peru. Arnaldoa 8(2): 25-43.

80. Sánchez-V.,I., G. Iberico V., M. Zapata, C., M. L. Kawasaki, & M.O. Dillon. 2001(2002). Nuevos registros para la flora de San Martín, Perú. Arnaldoa 8(2): 45-52.

81. Dillon, M.O. & A. Sagástegui A. 2001. Nuevo nombre para una especie de Chrysophyllum (Sapotaceae) del norte del Perú. Arnaldoa 8(2): 57-58.

82. Sánchez-V., I., G. Iberico V., A. Sagástegui A., M. Zapata C., M. L. Kawasaki & M.O. Dillon. 2002(2003). Biogeografía, Diversidad Florística y Endemismos En Dos Tipos De Bosques En El Norte de Perú. Arnaldoa 9(2): 111-120.

83. Dillon, M.O. 2003. New combinations in Luciliocline with notes on South American Gnaphalieae. Arnaldoa 10: 45-60.

84. Bayer, R., I. Breitwieser, M. Dillon, M. Koekemoer, & J. Ward. 2003. Phylogeny of the Gnaphalieae based on three cpDNA sequences (matK, trnL intron, and trnL/trnF intergenic spacer). Compositae Newsletter 40: 8.

84. Dillon, M.O., M. Nakazawa & S. Leiva. 2003. The Lomas Formations of Coastal Peru: Composition and Biogeographic History Pp. 1-9. In: Haas, J. & M.O. Dillon (eds.) “El Niño in Peru: Biology and Culture Over 10,000 Years.”  Fieldiana: Botany, N.S.  43, publ. 1524.

85. Sagástegui-A.,A., I. Sánchez V., & M. Zapata C. & M.O. Dillon. 2004. Diversidad Floristica del Norte de Perú - Tomo II, Bosques Montanos. Pp. 305. Trujillo, Peru.

86. Sagástegui-A., M. Zapata C., & M.O. Dillon. 2004. Una nueva especie de Puya (Bromeliaceae) para el Norte de Perú. Arnaldoa 11(2): 29-35.

87. Quipuscoa, V. & M.O. Dillon. 2004. Sinopsis de las Asteraceae del Departamento de Arequipa-Perù. Dilloniana 4(2): 125-152.

88. Freyre, R., A. Douglas, & M.O. Dillon. 2005. Artificial Hybridizations in Five Species of Chilean Nolana (Solanaceae). HortScience 40(3): 532-536.

89. Dillon, M.O. 2005. Solanaceae of the Lomas formations of Coastal Peru and Chile. Pp. 131—155. In: Hollowell, V., T. Keating, W. Lewis & T. Croat (eds.), “A Festschrift for William G. D’Arcy: The Legacy of a Taxonomist”. Mono. Syst. Bot. Ann. Missouri Bot. Gard. 104.

90. Dillon, M.O. 2005. Familia Asteraceae. Pp. 96-180. In: Flora Genérica de los Páramos: Guía Ilustrada de las Plantas Vasculares, (eds.) P. Sklenár, J.L. Luteyn, C. Ulloa U., P.M. Jørgensen, & M.O. Dillon, Mem. N.Y. Bot. Gard. 92.

91. Sánchez-Vega, I. & M.O. Dillon. 2006. Jalcas. pp. 81-94. En: Moraes R., M., B. Øllgaard, L. Peter Kvist, F. Borchsenius & H. Balslev (eds.) Botánica Económica de los Andes Centrales. Herbario Nacional de Bolivia, Instituto de Ecología, Universidad Mayor de San Andrés, La Paz.

92. Dillon, M.O. 2006. Nuevos registros de Asteraceae para la flora de Perú - New records in the Asteraceae flora of Peru. Arnaldoa 13(2): 314-317.

93. Funk, V.A., H. Robinson, & M.O. Dillon. 2007.  Liabeae (Asteraceae), Pps 175-180.  In: K. Kubitzki & J.W. Jeffrey (Eds.), The Families and Genera of Vascular Plants. Asterales. Vol. 8.  Springer Verlag, Berlin.

94. Rundel, P.W., P.E Villagra, M.O. Dillon, S. Roig-Juñent and G. Debandi. 2007. Chapter 11. Arid and semi-arid ecosystems. Pp. 158-183. In: Veblen, T.T., K. R. Young & A. R. Orme (eds.) The Physical Geography of South America, Oxford University Press: Oxford, UK, 368 p.

95. Dillon, M.O., T. Tu, A. Soejima, T. Yi, Z. Nie, A. Tye & J.Wen. 2007. Phylogeny of Nolana (Solanoideae-Solanaceae) inferred from granule- bound starch synthase I (GBSSI or Waxy)  marker.  Taxon 56: 1000-1011.

96. Dillon, M.O. , S. Leiva, & V. Quipuscoa. 2007. Five new species of Nolana (Solanaceae-Nolaneae) from Peru and notes on the classification for additional taxa.  Arnaldoa 14: 171-190.

97. Dillon, M.O., G. Arancio, & F. Luebert. 2007. Five new species of Nolana (Solanaceae-Nolaneae) from Chile. Arnaldoa 14: 191-212.

98. Soejima, A., J. Wen, M. Zapata & M.O. Dillon. 2008. Phylogeny and putative hybridization in the subtribe Paranepheliinae (Liabeae, Asteraceae), implications for classification, biogeography, and Andean orogeny. Journal of Systematics & Evolution 46: 375–390.

99. Dillon, M.O. 2007. Nolana sphaerophylla (Phil.) Mesa ex M.O.Dillon, p. 239.  In: Zuloaga, F. O., O. Morrone & M. J. Belgrano. Novedades taxonómicas y nomenclaturales para la flora del Cono Sur de Sudamérica. Darwiniana 45(2): 236-241.

100. Tu, T. M.O. Dillon, H. Sun, & Jun Wen. 2008. Phylogeny of Nolana (Solanaceae) of the Atacama and Peruvian Deserts inferred from sequences of four chloroplast markers and the nuclear LEAFY second intron. Mol. Biol. Evol.49: 561-573. doi:10.1016/j.ympev.2008.07.018

101. Leiva-G., S., M. Zapata C., G. Gayoso B., P. Lezama A., V. Quipuscoa S., & M.O. Dillon. 2008. Diversidad florística de la Loma Mongón, Provincia Casma, Departamento Ancash, Perú- Floristic diversity of Loma Mongon, Casma Province, Ancash Department, Peru. Arnaldoa 15(1): 45-62.

102. Leiva-G.,S., M. Zapata C., & M. O. Dillon. 2008. Caxamarca ayabacense (Asteraceae: Senecioneae) una nueva especie del Norte del Perú - Caxamarca ayabacense (Asteraceae: Senecioneae) a new species from Northern of Peru Arnaldoa 15(2): 177-183.

103. Dillon, M.O., V. Funk, H. Robinson, & R. Chan. 2009. Chapter 27. Liabeae. p. 441-461. In: Funk, V. A., A. Susanna, T. F. Stuessy & R. J. Bayer (eds.), Systematics, Evolution, and Biogeography of Compositae. International Association for Plant Taxonomy: Vienna. 1000 p. 

104. Funk V. A., A. A. Anderberg, B. G. Baldwin, R.l J. Bayer, J. M. Bonifacino, I. Breitwieser, L. Brouillet, R. Carbajal, R. Chan, A. X. P. Coutinho, D.J. Crawford, J. V. Crisci, M.O. Dillon, S. E. Freire, M. Galbany-Casals, N. Garcia-Jacas, B. Gemeinholzer, M. Gruenstaeudl, H. V. Hansen, S. Himmelreich, J. W. Kadereit, M. Källersjö, V. Karaman-Castro, P. Ola Karis, L. Katinas, S. C. Keeley, N. Kilian, R. T. Kimball, T. K. Lowrey, J. Lundberg, R. J. McKenzie, M. Tadesse, M. E. Mort, B. Nordenstam, C. Oberprieler, S. Ortiz, P. B. Pelser, C. P. Randle, H. Robinson, N. Roque, G. Sancho, J. C. Semple, M. Serrano, T. F. Stuessy, A. Susanna, M. Unwin, L. Urbatsch, E. Urtubey, J. Vallès, R. Vogt, S. Wagstaff , J. Ward & L. E. Watson. 2009. Chapter 44. Compositae metatrees: the next generation. 747-777. In: Funk, V. A., A. Susanna, T. F. Stuessy & R. J. Bayer (eds.), Systematics, Evolution, and Biogeography of Compositae. International Association for Plant Taxonomy: Vienna. 1000 p.

105. Luebert, F., J. Wen, & M.O. Dillon. 2009. Systematic placement and biogeographical relationships of the monotypic genera Gypothamnium and Oxyphyllum (Asteraceae: Mutisieae) from the Atacama Desert. Bot. Journ. Linn. Soc. 159: 32-51.

106. Dillon, M.O., T. Tu, L. Xie, V. Quipuscoa S., & J. Wen. 2009.  Biogeographic diversification in Nolana (Solanaceae), a ubiquitous member of the Atacama and Peruvian Deserts along the western coast of South America. Journal of Systematics & Evolution, 47(5): 457-476.

107. Dillon, M.O. & I. Sánchez V. 2009. A new species of Magnolia (Magnoliaceae) from the Alto Mayo region, San Martin, Peru. Arnaldoa 16(1): 7- 12.

108. Dillon, M.O. 2009. Nomenclatural changes in Nolana (Nolaneae, Solanaceae) – Cambios nomenclaturales en Nolana (Nolaneae, Solanaceae) Gayana Botánica 66(2): 294-296.

109. Dillon, M.O. & M. Zapata C. 2010. Angeldiazia weigendii (Asteraceae, Senecioneae), a new genus and species from northern Peru / Angeldiazia weigendii (Asteraceae, Senecioneae), un género y especie nuevo del norte del Perú. Arnaldoa 17(1): 19-24.

110. Tu, T., S. Volis, M. O. Dillon, H. Sunand, & Jun Wen. 2010. Dispersals of Hyoscyameae and Mandragoreae (Solanaceae) from the New World to Eurasia in the early Miocene and their biogeographic diversification within Eurasia. Molecular Systematics and Evolution 57(2): 1226-1237.

111. Dillon, M.O., S. Leiva G., M. Zapata C., P. Lezama A., V. Quipuscoa S. 2012. Floristic Checklist of the Peruvian Lomas Formations – Catálogo florístico de las Lomas peruanas Arnaldoa 18(1): 7–32.

112. Dillon M.O. & F. Luebert. 2014. Synopsis of Plazia Ruiz & Pav. (Onoserideae, Asteraceae), including a new species from northern Peru. PhytoKeys 34: 1–13. doi: 10.3897/phytokeys.34.6151

113. Dillon, M.O. & V. Quipuscoa S. 2014. Synopsis of Galvezia (Plantaginaceae: Antirrhineae), including a new cryptic species from southern Peru. J. Bot. Res. Inst. Texas 8(1): 47–55.

114. Leiva-G., S, M. Zapata C., G. Gayoso B., L. Chang C., M.O. Dillon, & V. Quipuscoa S. 2014. Floristic Diversity of the Loma Cerro Campana, Province Trujillo, Department La Libertad Trujillo-Peru / Diversidad Florística de la Loma Cerro Campana, Provincia Trujillo, Departamento La Libertad-Perú. Arnaldoa 21(1): 187-220.

115. Dillon, M.O. & F. Luebert. 2015. Gnaphaliothamnus nesomii (Asteraceae, Gnaphalieae), A New Species from Guatemala and Nomenclatorial Changes in the Gnaphaliinae.  J. Bot. Res. Inst. Texas, 9(1): 63-73.

116.    Barboza, G.E., A. T. Hunziker, G. Bernardello, A.A. Cocucci, A.E. Moscone, C. Carrizo Garcia, V. Fuentes, M.O. Dillon, V. Bittrich, M.T. Cosa, R. Subils, A. Romanutti, S. Arroyo, & A. Anton.  2016. Solanaceae. Pps 295-375.  In: K. Kubitzki & J.W. Jeffrey (Eds.), The Families and Genera of Vascular Plants. Asterales. Vol. 8.  Springer Verlag, Berlin.

117.    Quipuscoa, V.S., C. Tejada P., C. Fernández A., K. Durand V., A. Pauca T., & M.O. Dillon. 2016. Diversidad de plantas vasculares de las Lomas de Yuta, Provincia de Islay, Arequipa Perú. / Diversity of vascular plants in Lomas de Yuta, Islay province, Arequipa, Peru, 2016. Arnaldoa 23(2): 517-546.

118.    Luebert, F., A. Moreira-Muñoz, K. Wilke & M.O. Dillon. 2018. Phylogeny and evolution of achenial trichomes in the Lucilia-group (Gnaphalieae, Asteraceae) and their systematic significance. Taxon 66(5): 1184-1199.

119.    Dillon, M.O. 2018. New combinations in Belloa J. Rémy and new diagnoses for Andean Lucilia Cass. and Mniodes (A.Gray) Benth. (Gnaphalieae, Asteraceae) / Nuevas combinaciones en Belloa J. Rémy y nuevos diagnósticos de Andean Lucilia Cass. y Mniodes (A.Gray) Benth. (Gnaphalieae, Asteraceae). Arnaldoa, 25 (1): 51-73.

120.    Qupuscoa S., V., & M.O. Dillon. 2018. Four new endemic species of Nolana (Solanaceae-Nolaneae) from Arequipa, Peru. Arnaldoa 25(2): 295-322.

121.    Hepp, J., & M.O. Dillon. 2018. A new endemic species of Nolana (Solanaceae-Nolaneae) from near Iquique, Chile. Arnaldoa 25(2): 323-338.

122.    Dillon M.O. 2018. Griseliniaceae. Pps 505-509. In: Kadereit J., Bittrich V. (eds) Flowering Plants. Eudicots. The Families and Genera of Vascular Plants, vol 15. Springer, Cham

123.    Bayer, R.J., & M.O. Dillon. 2019. Quasiantennaria (Asteraceae, Gnaphalieae), a new genus from the central Andes / Quasiantennaria (Asteraceae, Gnaphalieae), un nuevo género de los Andes centrales. Arnaldoa 26(1): 9-26. 

124.    Quipuscoa S., V., M.O. Dillon, Í. Treviño, M. Balvin, A. Mejía, D. Ramos, K. Durand, D. Montesinos. 2019. Impacto de los cambios climáticos y uso de suelo, en la distribución de las especies de géneros endémicos de Asteraceae de Arequipa / Impact of climate changes and land use in the distribution of species of endemic genera of Asteraceae from Arequipa. Arnaldoa 26(1): 71-96.

125.Quipuscoa S., V. & M.O. Dillon. 2020.Three New Species of Mniodes A. Gray (Gnaphaliinae, Gnaphalieae, Asteraceae) from Bolivia and Peru and Nomenclatural Changes in the Lucilia-Group / Tres nuevas especies de Mniodes A. Gray (Gnaphaliinae, Gnaphalieae, Asteraceae) de Bolivia y Perú y cambios nomenclaturales en el grupo Lucilia. Arnaldoa 27(2): 375-404.

126. Dillon, M.O., A. M. DeLuycker, & V. Quipuscoa S. 2021. Biodiversidad Cuenca del Rio Alto Mayo / Biodiversity of the Cuenca Rio Alto Mayo. Pps. 420. ISBN 978-0-578-97524-5

127. Dillon, M.O., M. Zapata C., & V. Quipuscoa S. 2021. Paranephelius (Liabeae: Asteraceae): a case study in high-elevation hybridization & taxonomic insights. J. Bot. Res. Inst. Texas 15(2): 351–376.


Work experience

Principal Professional Employment:

  • Curator Emeritus, Botany Department, The Field Museum, Chicago, IL 60605 (2009-present)
  • Head of Phanerogams, Botany Department, TFM (1993-2014)
  • Chair, Botany Department, The Field Museum, Chicago, IL 60605-2498 (2005-2008)
  • Curator of Vascular Plants, Botany Department, TFM (1991-2008)
  • Associate Curator, Botany Department, TFM (1985-1991)
  • Assistant Curator, Botany Department, TFM (1981-1985)  
  • Visiting Assistant Curator, Botany Department, TFM (1978-1981)


Adjunct Appointments:

  • Honorary Professor, Universidad Nacional de Cajamarca, Cajamarca, Peru (1990-present)
  • Docente, Escuela de Post-Grado, Universidad Nacional de Cajamarca, Cajamarca, Peru (1997-present)
  • Visiting Professor, Universidad Antenor Orrego, Trujillo, Peru (1993-present)
  • Honorary Professor, Universidad Nacional de San Agustin, Arequipa, Peru (2002-present)
  • Honorary Professor, Universidad Ricardo Palma, Lima, Peru (2004-present)
  • Socio Honorario, Colegio de Biologos del Peru (1999)
  • Fellow, Center for Advanced Studies in Ecology & Biodiversity. Pontificia U. Católica de Chile. Santiago, Chile (2006)


Other Professional Positions:

  • Flora of Ecuador, Editorial Committee (2003 -present) 
  • Flora Neotropica, Editorial Committee (1999-2004)
  • Member, Flora Neotropica Commission (1995-present)
  • Editorial Committee, Chloris Chilensis (1999-2008)
  • Visiting Researcher Program, Tokyo Metropolitan University, Tokyo, Japan (May 1994) 
  • Visiting Professor & Curator, Beal-Darlington Herbarium, MSU, East Lansing, MI (1991-1992)
  • Arnold Arboretum Associate, Harvard University (1991-1992)
  • Adjunct Lecturer, University of Chicago (1981-1988) 
  • National Endowment to the Arts Postdoctoral Fellow, Missouri Bot. Garden, St. Louis, MO (1977-1978)
  • Instructor, Department of Biology, University of Northern Iowa (spring 1972)
  • Secondary Teacher (Biology & Chemistry), Des Moines, Iowa (1969-1970)



Andean Botanical Information System

The Andean Botanical Information System (ABIS) presents information from floristic and systematic investigations of the flowering plants (phanerogams) of Andean South America. Topics include selected geographic regions and groups of Andean plants, flora of coastal Peru and Chile, floristic inventories from a variety of habitats in northern Peru, bibliographic resources, and searchable databases. Site launched in 1994.