240 2S. ASPIDIDM. § 2. SAGENIA. 



c.c. Fully developed fronds more than 25 c.M. long. 



(22) A. melanocaulon. 

 b.b. Stipes not black. 



X. Stipes greyish, finely villose. (25) A. irriguum. 

 x.x. Stipes castaneous, slightly scaly at the base. 



(24) A. nebulosum. 

 a.a. Rhizome creeping. (25) A. subtriphyllum. 



d.±. Sort in 2 rows between the main veins (*), in i row on each side of the 

 ■ costa^ in No. 2Q. cnr <L<:p^-tuXa.jLj . 

 a. Fronds palmatifid or pinnatifid. 



^. Stipes winged nearly or quite to the base. 



7. Fronds + 20 — 30 c.M. long, the edges serrate or toothed. 



(26) A. heterodon. 



y.y. Fronds + 60 — i20 c.M. long, the edges entire, repand or 



sinuate. (27) A. decurrens. 



p.p. Stipes not winged. (28) A. palmatum. 



a.a. Fronds 3-nale, each division 3-partite. (29) A, stenophyllum. 



a-.a-.a-. Fronds simple or generally 3 — oo foliate, the divisions simple, pinnatifid, 



or even pinnate at the base. 



P'. Texture herbaceous to papyraceous. 



i. Stipes more or less densely hairy. (30) A. Keckii. 



7'.7'. Stipes naked, or scaly at the base. 



^'. Lateral pinnae in + i — 6 pairs below the terminal one. 

 e'. Lowest pinnae pirtnatifid or pinnate at the base. 

 X. Stipes brown or rufous. 



:(;. Central pinnae sinuate or slightly lobed. 



(51) A. Tariolosnm. 

 ;^.:^. Central pinnae pinnatifid. 



(52) A. coadanatum. 



x.x. Stipes ebeneous. (55) A. latifolium. 



t'.s'. Lowest pinnae forked at the base. Fronds 60 — 90 



C.M. long. (34) A. grande. 



S'.3'. Lateral pinnae in ± 9 — ii pairs, the 2— A lowest 



pairs 2 — 3-furcate. (55) A. nudum. 



'/.y'.y'. Stipes more or less scaly throughout. 



(56) A. multicaudatum. 



(*) See also A. polymorphium, WaU. 



