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Alsophila.| FILICES. 573 
fallen fronds or the persistent bases of their stipes. Fronds pinnate 
or decompoundly pinnate. 
Pinnules glaucous beneath, the segments entire. 
Stipes and rachises (in Burmese plant) quite smooth, pruinous . A, contaminans. 
* * Pinnules uniformly green; segments crenulate (at least 
a 
Sori placed in 2 diverging rows forming the letter V; stipes and 
rachises glossy dark-brown, smooth; pinnules petioled . . A. glabra. 
Sori placed in 2 parallel dense rows; stipes and lower part of 
rachis prickly tubercled, the secondary rachises above densely 
. ° : : . A, latebrosa. 
villous; pinnules sessile . : 
1. A. contaminans, Wall.—An evergreen fern-tree (8—15+ 
3—6 4+1—1}4), the young fronds tawny-tomentose and covered with 
glossy tawny scales ; fronds bipinnate, 4-7 ft. long, the stipes and 
rachis pruinous, smooth, or more or less prickly ; primary pinne 2 ft. 
long or longer, acuminate ; pinnules sessile, 3-6 in. long, linear- 
oblong, deeply and almost to the rib pinnatifid, caudate-acuminate, 
glaucous or almost whitish beneath, the segments almost falcate- 
oblong, blunt, entire or nearly so, 4-3 in. long by 2-3 lin, broad (the 
fruiting ones narrower), the veinlets simple or forked ; sori nearer 
to the rib than to the margin ; emptied receptacles surrounded by 
a minute slightly lobed and cut membrane. 
Var. 1, contaminans proper : stipes and rachis prickly. 
Var. 2, inermis: stipes and rachis quite unarmed, pruinous. 
: very rare in the tropical forests of the eastern slopes pi the 
Has. ly var. 2 
Pegu Yomah, more frequent in those of Martaban and Tenasserim.—s.— 
SiS. Metam. 
Has.—F i one choungs, in the tropical forests from 
Martaban ck goa saoern “a Chittaoong.—Fr. OS. & HLS.—s.—SS.—= 
etam. 
_ 8. A. latebrosa, Hook.—An evergreen fern-tree (20—30 + 15— 
25 42—3), the trunk black and rough from the sears and remnants of 
the stipeses, the frond-shoots rusty-tomentose ; fronds bipinnate, 4-6 
ft. long, the stipes and lower part of the rachis prickly tubercled, the 
secondary rachises all rusty-villous on the upper side and glabrous 
