The document presents a dichotomous key of Pteridophyta. It divides the group into 1a) plants with a non-woody habit and 1b) plants with a woody habit. These are further divided based on characteristics like whether the plant is creeping, climbing, or has single or compound leaves. The key also distinguishes groups based on features of their sporangia such as location, dispersal pattern, and branching characteristics. In total there are 13 numbered groups delineated by the key based on these morphological characteristics.

1. BAGAN DIKOTOMI
PTERIDOPHYTA
(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
1a 1b
Habitus Bukan Pohon Habitus Pohon
( 3, 4, 8, 9, 11) (1, 2, 5, 6, 7, 10, 12, 13)
2a 2b 6a 6b
Merambat Memanjat Daun Majemuk DaunTunggal
(3, 4, 9, 11) (8) (1, 2, 5, 7, 10, 12) (6, 13)
3a 3b 7b 7a 12a 12b
Letak Sporangium di Strobilus Letak Sporangium di Sorus Sporangium Tersebar Sporangium Berkumpul Tak Bercabang Bebas
(3, 4) (9, 11) (1, 12) (2, 5, 7, 10) (6) (13)
4a 4b 5a 5b 11a 11b 8a 8b
SporangiumTersebar Tak Nampak Daun Sejati Daun Pasak Dikotom Tak Bercabang Menyirip Tak Menyirip
(3) (4) (9) (11) (1) (12) (2, 5) (7, 10)
9a 9b 10a 10b
Semi Dikotom Continue Continue Tak Bercabang
(2) (5) (7) (10)