FERNS OF THE MALAY-ASIATIC REGION. 47 



55. Cyathea lanaensis Christ in Philip. Journ. Sci. Bot. 3 (1908) 271. 

 Frond 65 cm long, 45 cm broad, tripinnatifid, stipe rough with 



minute tubercles; rachis glabrescent, reddish-brown; middle pinnae 30 

 cm long, 8 cm wide, sessile, the lower ones reduced and deflexed; 

 pinnules 6 cm long, 12 mm wide, about 20 on a side, crowded, sessile, 

 cut to a narrow wing, sinuses acute, costae beneath bearing red-brown, 

 bullate squamules; segments close, about 15 on a side, entire, acute, 

 glabrous, papyraceous, green, paler beneath; veinlets 6 on a side, forked 

 at the base; sori costular, indusium breaking down early to an irregular, 

 spread-out base, receptacle large, globose. 

 Mindanao (Lake Lanao). 



56. Cyathea korthalsii Mett. 



Pinnae 45 cm or less long ; primary rachis yellow-reddish beneath, with 

 short, ferruginous tomentum above, secondary rachises bearing a few long, 

 flaccid paleae beneath; pinnules sessile, 5 to 6 cm long, 12 mm wide, 

 oblong, acuminate, costae beneath bearing sparse, bullate, fuscous scales; 

 segments narrowly oblong, obtuse, subfalcate, scarcely serrate, connected 

 by a narrow wing; sori costular, indusium firmly membranaceous, break- 

 ing at the top first, then irregularly. 



Sumatra, Java, Mindanao, Celehes. 



57. Cyathea hymenodes Mett. 



Frond broadly lanceolate, membranaceous; stipe 17 cm long, densely 

 beset with short spines; rachis subasperous, dark-purple-brown, tomen- 

 tellous above; middle pinnae up to 60 cm long; pinnules about 7.5 cm 

 long, oblong, acuminate, sessile, costae minutely scaly beneath, densely 

 tomentellous above; segments close, oblong-falcate, obtuse, obscurely 

 serrate, 10 mm long, 3.5 mm wide, confluent; veinlets about 9 on a side, 

 mostly forked ; sori costular, indusium thin and all but the base transient. 



Sumatra. 



58. Cyathea oriental is Moore. 



Trunk 7 m more or less high, 13 cm thick; fronds up to 2.5 m long 

 and 1.3 m broad; stipe short-muricate, bearing long scales at the base; 

 pinnae on stalks 2 to 4 cm long; pinnules sessile or nearly so, 8 to 10 cm 

 long, 13 mm broad, abruptly caudate-acuminate, pinnatifid almost to the 

 costa, clothed beneath with ferruginous scales; segments linear-oblong, 

 subfalcate, serrate; veinlets 8 to 12 on a side, mostly forked; sori costular, 

 copious; indusium at first globose, after opening cup-shaped, slightly 

 contracted at the top, with an even rim, chestnut-brown. 



Java, Celebes. 



59. Cyathea walkerae (Presl) Hooker. 



Stipe unarmed or slightly muricate; frond ample, bi- or tripinnate, 

 thick, very coriaceous ; rachises and cost* hairy- above, scaly or glabrescent 



