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, Celebes. 
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 costae hairy above, scaly or glabrescent 
