PTERIDOPHYTA HALCONENSES. 
123 
Aspidium sp. near A. decurrens Presl. 
In forests at 100 m. alt. (No. 5871). 
A very tall fern with the lower pairs of pinnae not quite connected by a wing 
and with but a very narrow wing decurrent a third of the way down the stipe. 
Aspidium cicutarium (Linn.) Sw. 
In the humid forests at 200 m. alt. (No. 5870), a very chaffy form which I 
have not seen before. On cliffs in dense forests at 1,800 m. alt. (No. 5869), a 
small flaccid form with rounded lobes, already known from Bontoc, Luzon. Other 
forms are not common in the Archipelago. 
Pantropic. 
POLYSTICHUM Roth. 
Polystichum horizontale Presl (P. aculeatum var. batjanense Christ; Aspidium 
batjanense Christ.) 
Epiphytic and terrestrial in the ridge forests at 800 m. alt. (No. 5879) . 
In the rain forest and submossy forest from Luzon south to Batjan. 
Specimens of Polystichum aculeatum var. batjanense determined by Christ, are 
identical with the P. horizontale collected by Cuming; they do not agree well with 
Blume’s description of Aspidium moluccanum, but I have no specimens of the 
latter species. 
Polystichum amabile (Bl.) J. Sm. 
On cliffs in forests at 2,000 m. alt. (No. 5878). 
Throughout the Philippines at lesser altitudes. 
Malaya to India and Japan. 
Polystichum carvifolium (Kze.) C. Chr. (P. coniifolium Presl). 
In ridge forests at 700 m. alt. (No. 5877). 
Common throughout the Philippines in the upper high forest. 
Natal to Hawaii. 
CYCLOPELTIS J. Smith. 
Cyclopeltis presliana (J. Sm.) Berk. 
On cliffs in forests at 300 m. alt. (No. 5880), a form with small obtuse pinnae. 
Common in the Philippines; (perhaps Aspidium Kingii Hance) . 
Burmah to New Guinea. 
LEPTOCHILUS Kaulfuss. 
Leptochilus heteroclitus (Presl) C. Chr. 
On boulders in humid forests at 100 m. alt. (No. 5883), pinnae ovate and 
caudate, otherwise typical. 
Common in the Philippines and exceedingly variable. 
India to Melanesia. 
Leptochilus Zollingeri (Kze.) Fee. 
In a deep ravine at 300 m. alt. (No. 5884), specimens all simple. 
Luzon, Mindanao. 
Malaya. 
