34 COPELAND. 



7. Cyathea rheosora (Baker) Copel. (Alsophila rheosora Baker in Journ. 

 Bot. 28 (1890) 262). 



Trunk 1 m high; frond ample, deltoid, bipinnate, moderately firm in 

 texture, green and glabrous on both surfaces; rachises brown, without 

 scales or prickles; pinnae oblong-lanceolate 45 to 60 by 17 to 20 cm; 

 pinnules lanceolate, deeply crenate, 15 to 18 mm broad, truncate at base, 

 the lower distinctly stalked; main veins 3 mm apart; veinlets 4 or 5 on 

 a side, simple ; sori costular, crowded, exindusiate. Related to C. glabra 

 and C. podophylla. 



Tonkin. 



8. Cyathea dimorpha (Christ) Copel. (Alsophila dimorpha Christ in Ann. 

 Jard. Bot. Buiten. II 4 (1904) 41). 



Trunk 4 m high; Stipe and rachis chestnut, unarmed but rough, 

 clothed with obscure furfuraceous scales; pinna? dimorphous, the fertile 

 occupying the middle of the frond; sterile pinnules shallowly lobed with 

 crenulate lobes, fertile pinnules deeply pinnatifid; veinlets simple, about 

 3 on a side; sori large, exindusiate. 



Celebes. 



9. Cyathea fructuosa Copel. in Elmer's Leaflets, 2 (1908) 419. 



Trunk 3 to 5 m high, 10 cm thick; frond almost sessile, 2 m long, 

 60 to 90 cm broad, tripinnate ; rachis setose-paleaceous above, furfuraceous 

 beneath, rough, rachises of pinna? clothed beneath with minute fur- 

 furaceous squamules and large rufo-stramineous scales 5 mm long; costa? 

 clothed beneath with smaller palea? of the same color; secondary pin- 

 nules distinct and separate, 12 mm long, 2 to 2.5 mm broad, dimorphous, 

 the sterile entire or nearly so, the fertile deeply crenate; sori round, 

 crowded; indusium rust-color. 



Negros Island, on Horn of Negros Mountain. 



10. Cyathea mindanaensis (Christ) Copel. (Alsophila mindanaensis Christ 

 in Monsunia 1 (1900) 90). 



Frond hard-coriaceous; pinna? 40 cm long, ovate, dimorphous; sterile 

 parts apparently tripinnatifid, the fertile tripinnate; rachis clothed with 

 long, wooly, rufous fibrils, not spiny; veinlets forked; sori minute, cos- 

 tular, exindusiate. 



Mindanao, district of Davao. 



11. Cyathea philippinensis Baker. 



Trunk short, slender; frond 1 m long, 30 cm broad; stipe short, 

 very scaly; rachises all densely paleaceous with gray and brown scales, 

 unarmed; larger medial pinnae bipinnate at the base; pinnules sessile, 

 acute, costae sparsely hairy above, scaly beneath; segments 4 mm long, 

 3 mm broad, entire or crenulate, obtuse, lamina glabrous, coriaceous; 



