PTERIDOPHYTA HALCONENSES. 
145 
Hymenophyllum denticulatum Sw. 
On trees in forests at 900 m. alt. (No. 6071). This and the preceding species 
are too close together. Merrill’s No. 6058 collected at 200 m. alt. is almost 
intermediate. 
Luzon. 
India, Malaya. 
CYATHEACEJE. 
DICKSON I A L’Herit. 
Dicksonia chrysotricha (Hassk.) Moore. 
A small tree-fern on ridges at 1,100 m. alt. (No. 6009). 
Also known from Mindanao ( Copeland 1456), Mount Apo at 2,000 m. alt., and 
from San Ramon at 1,300 m. alt. 
Java and ( ?) Celebes. 
This species is notable for the usual restriction of the sori to the few lowest 
pinnules of the major pinna. It is the only arboreous Dicksonia occurring in this 
part of the World north of the equator. 
CIBOTIUM Kaulf. 
Cibotium Cumingii Kze. 
On ridges in the mossy forest at 1,400 m. alt. (No. 6008) ; fronds 2 m. long; 
trunk wanting. 
This is the usual Philippine form, already known on many Luzon mountains 
but previously from no other island. It has but one sorus on each side at the 
base of the segment, instead of two or more as is usual in the ease of C. Barometz. 
CYATHEA Smith. 
Cyathea spinulosa Wall. 
Abundant in forests between 800 and 1,100 m. alt. (No. 6056), the secondary 
racliises usually hirsute. 
Luzon, Negros and Palawan. 
Malaya to India and Japan. 
Cyathea sp. near G. Christii of Negros and Mindanao and G. spinulosa. Stipe 
very short, rachis not very spiny nor very red, barely tripinnate with narrow 
pinnules 11 (or segments) and glabrous costae. Stem 3 m. high. 
Ridge forest at 1,800 m. alt. (No. 6055). 
Cyathea tripinnata Copel. in Philip. Journ. Sci. 1 (1906) Suppl. 251. 
In the ridge forest at 1,800 m. alt. (No. 6054). “Trunk 15 ft, high, leaves 8 ft. 
long, with about 18 pinnae on each side.” 
Previously known only from the type locality, Mount Mariveles, Luzon. 
ALSOPHILA R. Br. 
Alsophila latebrosa Wall. (?). 
“Tree-fern 20 ft. high, fronds 15 ft. long, pinnae about 18 on each side, the 
lower ones about 6 inches long, very common in old clearings” (No. 6053). 
The rachis and pinnae are exactly like those of some of my Indian specimens 
of A. latebrosa Wall., but the bases of the stipes are very densely clothed (a) 
with long brown hairs; ( b ) with lanceolate, membranous, almost white scales 2 
to 3 cm. long with narrow black bases, and (c) paleae intermediate in form. It 
seems incredible that these should have escaped description if this is the real 
A. latebrosa .• 
