TABLE 1. Taxa for proposed research. Letters after names indicate morphological and or sequence data available or published: a = morphology (Pryer et al., 1995); b = rbcL (Hasebe et al., 1995); c = partial 26S (300-1300 bp; unpubl.); d = 18S (unpubl., deposited in GenBank), e = 16S (Manhart, 1995), f = partial atpB (600 bp; unpubl.). Taxa in italics are available as living plants at Utah State Univ. and/or UC-Berkeley. Taxa in bold are available as DNA extract in stock. (Some taxa are available as both). Taxa with no indicators will be obtained from outside sources or from herbarium material (see Research Plan). Classification used here generally follows Kramer (in Kubitizki, 1990), except for a few modifications, as given in Flora of North America Editorial Committee (1993), to reflect more recent publications.

Marattiaceae 1 Angiopteris evecta a, b, e, f 2 Marattia attenuata Ophioglossaceae 3 Botrychium strictum a, b 4 Ophioglossum engelmannii b, e, f Osmundaceae 5 Todea barbarea 6 Osmunda cinnamomea a, b, d, e, f Hymenophyllaceae 7 Hymenophyllum fucoides b 8 Vandenboschia davallioides b, c, d, f Loxomataceae 9 Loxoma cunninghamii b Gleicheniaceae 10 Stromatopteris moniliformis a, b 11 Diplopterygium glaucum a, b 12 Dicranopteris linearis b, d Matoniaceae 13 Matonia pectinata a, b Dipteridaceae 14 Dipteris conjugata a, b Cheiropleuriaceae 15 Cheiropleuria bicuspis a, b Schizaeaceae 16 Anemia mexicana a, b 17 Actinostachys digitata a, b 18 Lygodium japonicum a, b, e Marsileaceae 19 Marsilea quadrifolia a, b Azollaceae 20 Azolla caroliniana a, b Salviniaceae 21 Salvinia cucullata a, b Plagiogyriaceae 22 Plagiogyria japonica a, b Cyatheaceae 23 Sphaeropteris lepifera a, b Metaxyaceae 24 Metaxya rostrata a, b Dicksoniaceae 25 Dicksonia antarctica a, b, c, d, f 26 Calochlaena dubia a, b

Hymenophyllopsidaceae 27 Hymenophllopsis sp. Lophosoriaceae 28 Lophosoria quadripinnata Dennstaedtiaceae s.l. 29 Lonchitis hirsuta a, b, c, d, f 30 Dennstaedtia punctilobula a, b, c, f 31 Lindsaea odorata a, b Monachosoraceae 32 Monachosorum henryi a, b, c Pteridaceae 33 Adiantum raddianum a, b, d, f Aspleniaceae 34 Asplenium filipes b, f Blechnaceae 35 Blechnum occidentale a, b Polypodiaceae 36 Polypodium australe a, b Psilotaceae 37 Psilotum nudum a, b, c, d, e, f Equisetaceae 38 Equisetum arvense a, b, e, f OUTGROUPS Lycopodiaceae 39 Huperzia lucidula d Selaginellaceae 40 Selaginella apoda b, e Isoetaceae 41 Isoetes melanopoda b, e Cycadaceae 42 Cycas circinalis a, b