Hymenophyllum species

Dubuisson, Jean-Yves, Hennequin, Sabine, Droissart, Vincent & Deblauwe, Vincent, 2016, Hymenophyllum senterreanum Dubuisson & Deblauwe, sp. nov. (Hymenophyllaceae) and its relatives in western Central Africa, Phytotaxa 257 (3), pp. 287-294 : 292-293

Key for Hymenophyllum species in west-central Africa

(For full species descriptions see Kornás 1993)

1. Fronds fully glabrous..........................................................................................................................................................................2

-. Fronds with marginal hairs (subg. Sphaerocionium )..........................................................................................................................4

2. Lamina margins serrulate or sharply dentate (subg. Hymenophyllum ) ......................................................................... H. triangulare

-. Lamina margins entire........................................................................................................................................................................3

3. Indusia clearly bilabiate without a thick obconic base; rhizomes with thin dark reddish-brown hairs (subg. Mecodium ) ................. ............................................................................................................................................................................................... H. kuhnii

-. Indusial lips partially fused along margins, base thick and obconic; rhizomes with thick whitish to translucent hairs ...................... ................................................................................................................................................................................... H. senterreanum

4. Rachis and stipe wingless................................................................................................................................................. H. capillare

-. Rachis and stipe winged.....................................................................................................................................................................5

5. Hairs present only on veins and margins; fronds rarely exceed 12 cm long..................................................................... H. hirsutum

-. Hairs present on the whole lamina (not only on veins and margins); fronds can reach 30 cm long............................ H. splendidum