Flora Zambesiaca

Keys

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Key to Adiantaceae


1 a Sori covering the whole under surface or borne along the veins
go to  2
b – Sori marginal or submarginal
go to  6
2 a Sori covering the under surface of the fertile pinnae
FZ account for Acrostichum
b – Sori borne along the veins
go to  3
3 a Lamina with orange, yellow or white powder on the under surface of the lamina
Key to  Pityrogramma FZ account for Pityrogramma
b – Lamina without powder on the under surface
go to  4
4 a Pinnae oblong-caudate, denticulate; rhizome creeping
FZ account for Coniogramme
b – Pinnae neither caudate nor denticulate; rhizome erect
go to  5
5 a Segments of fertile lamina obovate-cuneate, incised; plant terrestrial; fronds uniform
FZ account for Anogramma
b – Segments of fertile lamina narrowly linear; plant aquatic; fronds succulent, dimorphous
FZ account for Ceratopteris
6 a Sori borne on reflexed marginal flaps
Key to  Adiantum FZ account for Adiantum
b – Sori borne on the surface of the lamina near the margin and usually covered by it
go to  7
7 a Fronds pinnately divided
go to  8
b – Fronds dichotomously flabellate
Key to  Actiniopteris FZ account for Actiniopteris
8 a Sori minute, borne in the sinuses of marginal teeth
FZ account for Aspidotis
b – Sori not borne in the sinuses between marginal teeth
go to  9
9 a Ultimate fertile segments with linear to narrowly oblong indusia and with a distinct entire to serrate sterile apex
Key to  Pteris FZ account for Pteris
b – Ultimate fertile segments without a distinct sterile apex
go to  10
10 a Fronds pedate and glabrous
Key to  Doryopteris FZ account for Doryopteris
b – Fronds pinnate or pinnately dissected, or if pedate then pilose
go to  11
11 a Sori discrete, borne on vein endings
Key to  Cheilanthes FZ account for Cheilanthes
b – Sori continuous
Key to  Pellaea FZ account for Pellaea

Flora Zambesiaca