V 



l4 1. CYATHEA. 



A.S. Tertiary segments + toothed. 



S, Veins 5 — 6 on each side ofjhe costulae. 



. (10) d suluensis. 

 S.S. Veins 9 — d2 on each side. | 



*. Texture papyraceous. Son in + 4 — o pairs § 



to a lobe. (11) C. saccata. 



«.«. Texture coriaceous. Sori in + 8 pairs to a lobe. ^ 



(12) C. cyclodonta. 

 3.3. Main rachis not prickly, but scaly, hairy or tommtose, at least | 



on the upper- side, often rough or roughish. (See also G. hymmodet 

 a. Texture membranaceous to papyraceous. 

 ^. Main rachis hairy or tomentose. 



y. Ultimate segments obecuroly opmalo, slightly scaly 



beneath. (13) C. fusca. A 



y.y. Ultimate segments eorratOf naked beneath. 



(14) C. integi-a. 

 p.p. Main rachis squamose. (15) C. assimilis. A 



a.m.. Texture chartaceous to coriaceous. 



|S'. Main and secondary rachises provided mth prom 

 inent tuherculiform glands (aerophores) on the 

 lower side, near the bases of the pinnae and 

 pinnulae. (16) C. Zollingeriana. 



p'.p'. Rechises without glands (aerophores), or the 

 glands flat, depressed. 



y. Main rachis hairy or tomentose, not scaly. 

 S'. Sori costular.'l (See also C. hymenodes 

 and C. spinulosa). 



£. Indusium evanishing or breaking 



down more or less irregularly into 



2 or more fragments. 



• Gostae beneath naked or bUUato- 



squamulose. (17) C. Korthalsii. 



»• Gostae beneath hairy, furfur- 



aceous or plano-squamulose 



(chaffy). 



(18) C. crenulata. 



e'.e'. Indusium at length regularly cup- 

 shaped with an entire, truncate 

 mouth. (19) C. orientalis. 



