﻿1. CYATHEA. 15 



$.$. Pinnae more than 20 c.M. long; veins + 

 7 — 10 on each side. 



*. Lower' sori divaricating. Indusium at 

 length regularly cup-shaped. 



(22) C. javanica. 



*.*. Lower sori not divaricating. Indusium 



deciduous or breaking down irregularly . 



•J". Sori costular. (23) C. suiuatrana.- 



•f .•J'. Sori rather medial. 



(24) C. inquinans. 

 3.3.3. Main rachis + prickly. 



4L. Upper surface whitish when dry. (28) C. leucophaes. 

 S=.S=. Upper surface not whitish when dry. 



5. Sori distant from the costulae. (26) C. strigosa. 



5.5. Sori costular. 



e. Rachises tomentose above. Pinnulae 6 — -JYa c.M. 



long. Sori few to a lobe. (27) C. hymenodes. 



e.6. Rachises not tomentose. Pinnulae 8 — i2 c.M. 



long. Sori many to a lobe. (28) C. spinulosa. 



2.2. Pinnulae pinnate + throughout. 



§. Main rachis not prickly, naked. (^29) C. Muelleri. 



§.§. Main rachis not prickly, but scaly, hairy or tomentose. 



*. Edges crenate ; each crenation corresponding with a bullate 



vault, prominent on the upper surface. (30) C. oinops. 



*.*. Edges entire or crenulate; prominent, bullate vaults wanting. 



(31) C. schizochlamys. 

 §.$.§. Main rachis prickly and tomentose or + furfuraceous. 



•J". Tertiary segments adnate to the rachis. Under surface 



cobwebby. (32) C. arachnoidea. 



•{•.•J-. Lower tertiary segments slightly stalked. Under surface 



naked or inconspicuously scaly. (33) C. celebica. 



* (1) C3. laioluecaisa, R. JBr., Desv., Prod.,. 322; C.brunonis, Wall., 

 Hk. Bk., Syn. Pil., 16, Schizocaena. brunonis, J. Sm., Bau. & Hk., Gen. Pil., 

 tab. 11. 



Stipes 50 — 100 c.M. long, the base slightly rough and furnished with 

 brown scales. Fronds large, ± 100 c.M. long, simply pinnate. Pinnae nu- 



