FERNS OF THE MALAY-ASIATIC REGION. 33 



rowly lanceolate, acuminate, subsessile, coarsely dentate-pinnatilid, more 

 or less entire toward the apex; veinlets pinnate; sori dorsal on the veins 

 or in the lower axils; indusium breaking into irregular lobes. 

 Ceylon, with C. sinuata. 



4. Cyathea dulitensis Baker. 



Trunk short, 30 cm high; stipe 45 cm long, brown, clothed at the base 

 with large linear-subulate, membranaceous, brown scales, naked upward; 

 frond 30 cm long, 12 to 15 cm broad, thick-coriaceous, green and glabrous 

 on both sides, bipinnate; pinna; 21 mm wide, lowest reduced and detlexed, 

 the lower ones stalked; pinnules 4 mm wide; linear-oblong, subentire, 

 margin detlexed, the lowest free but adnate; veinlets forked, immersed; 

 sori medial, indusia campanulate, glabrous, persistent, breaking irregularly. 



Borneo (Sarawak, Mount Dulit, alt. 1,200 m.) 



5. Cyathea alternans (Wall.) Presl. 



Trunk 3 to 4 m high; frond bipinnate at base; pinnae up to 15 cm 

 long, 15 cm broad, sometimes much smaller, stalked; pinnules entire 

 or serrate, acuminate ; rachis smooth and glabrous, tawny-brown ; veinlets 

 once or twice forked; sori more or less biseriate; indusium thin and 



fragile. 



Penang, Borneo. 



6. Cyathea podophylla (Hooker) C'opel. (Alsophila podophylla Hooker in 

 Journ. Bot. 9 (1857) 334). 



Frond typically simply pinnate, but sometimes bipinnate with almost 

 entire lobes, or even tripinnate ; rachises hairy above, dark purplish ; son 

 minute, globose, in one to several rows parallel to the costa, those nearest 

 the costa medial on their veinlets, but those nearest the apex almost cos- 

 tular ; indusium none. 



This is a variable fern, and not always distinct from C. glabra. 



Hongkong, Chusan, ( ? ) Liu Kiu. 



Alsophila dubia Beddome in Journ. Bot. 2G (1888) 1, is intermediate 

 between C. glabra and C. podoplnjlla, but said to be nearer the latter. 

 It is described as follows: Hachises purple-brown, slightly furfuraceous 

 above, glabrous beneath ; frond subcoriaeeo-membranaeeous ; pinna? 40 to 

 50 cm long, pinnate, apex pinnatitid ; pinnules 10 cm long, 15 mm broad, 

 on petioles 2 to 3 mm long, very acuminate, more or less truncate at 

 base, pinnatitid only about one-sixth of the way to the costa, lobes rather 

 truncate; costge scaly beneath or at length glabrous, furfuraceous above; 

 veinlets simple; sori large, usually on the lowest 1 or 2 veinlets, some- 

 times on 3 or 4 veinlets, then costular and not forming an inverted V 

 as in C. glabra. 



Perak, alt. 1,200 m, Borneo, Java. 



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