FERNS OF THE MALAY- ASIATIC REGION. 
63 
fertile pinnae lobed almost to the costa; lobes about four on a side, each 
almost entirely occupied by a large sorus. 
Java, Celebes, Mindanao, Negros, Mindoro, at middle elevations ( 1,000 to 2,000 
m). 
4. CIBOTIUM Kaulfuss. 
Caudex stout and erect, sometimes arborescent, the apex densely 
imbedded in brown or golden chaff ; fronds large, tripinnatifid or tripin- 
nate; sori marginal on the lower part of the segments, at the apices of 
veins, the fertile tooth like the indusium, brown and coriaceous, the two 
inclosing the young sorus; annulus complete, but with a stomium of 
distinct cells. About 12 recognized species, in and near Central America, 
in the Hawaiian Islands, and here. I follow Dr. Christ in the treatment 
of our species. 
Sori 2 or more on each side of the segments. 
Pinnules 2 cm or more wide. 
Sori 2 to 4 on a side, not prominent 1. G. baranetz 
Sori 5 or 6 on a side, prominent 2. G. assamicum 
Pinnules 8 mm wide 3. G. sumatranum 
Sori 1 on each side of the segments 4. G. cumingii 
1. Cibotium baranetz (L.) J. Sm. 
Larger pinnules 2 cm wide ; stalked, narrowly lanceolate, long-acu- 
minate at the base cut very nearly or quite to the costa, costa more or 
less hairy; segments lanceolate, falcate, acute, about 1 cm long, subentire 
or somewhat serrate, decidedly glaucous beneath, separated by narrow 
sinuses; veinlets mostly simple; sori usually 2, sometimes 3 or 4 on each 
side, not prominent, 1 mm wide, the lowest oblique, the others parallel 
to the segment, the outer valve of the indusium the larger and more 
convex. The caudex is erect and stout but usually not arborescent. 
Liu Kiu across China to Malacca and northeastern India; Java ( ?). 
2. Cibotium assamicum Hook. 
Pinnules up to 25 mm wide; larger segments 15 mm long, evidently 
serrate; sori prominent, borne on teeth, up to 6 on a side; valves more 
unequal, and texture of whole plant rather thinner than in C. Baranetz, 
which it resembles except as just noted. A plant in cultivation at Buiten- 
zorg agrees perfectly with this species as described, except in not being 
glaucous beneath. 
Assam, Tonkin. 
3. Cibotium sumatranum Christ in Philip. Journ. Sci. Bot. 2 (1907) 118. 
Fertile pinnules only 8 mm wide, cut to a wing 1 mm wide; segments 
3 mm long, obtuse, denticulate, separated by obtuse sinuses; sori 2 or 
rarely 3 on a side, 0.5 to 0.7 mm wide, not prominent, valves subequal; 
plant glabrous or nearly so. 
