PTERIDOPHYTA HALCONENSES. 
133 
SYNGRAMMA J. Sm. 
Syngramma alismaefolia (Presl) J. Sm. 
On river banks at 200 m. alt. (No. 5922). 
A rare fern from central Luzon southward. 
Malaya. 
PLAGIOGYRI A (Kze.) Mett. 
Plagiogyria glauca (Bl.) Mett. 
On ridges in the mossy forest at 1,800 m. alt., and above (No. 5963). 
Already known from the Philippines from Mount Apo, Mindanao, and the 
highlands of northern Luzon where there are derived species. 
India, Malaya, Formosa and Yunnan. 
Plagiogyria tuberculata Copel. var. latipinna Copel. n. var. 
Typo pinnis fertilibus latioribus, 3-4 mm. latis, diversa. 
In dumetis, 2,400 m. s. m. (No. 5962). 
In this collection are dwarfed, more coriaceous plants from more exposed 
ridges, and others, even more ample than the type, from more sheltered places. 
The type of the species is from Bagnen, Lepanto, Luzon. 
Plagiogyria Christ! i Copel. 
On mossy ridge at 2,100 m. alt. (No. 5961). 
The type is from Mount Apo, Mindanao. Possibly too near P. euphlebia Mett. 
Plagiogyria falcata Copel. n. sp. (PI. I, Fig. B.) 
Candice erecto, 5 mm. crasso, basibus stipitium persistentibus profunde 
obtecto; stipitibus- confertis frondium sterilium 7-10 cm., frondium 
fertilium 16-24 cm. altis, glabris, deorsum triangulatis, pedibus incras- 
satis aerophoris carentibus; fronde sterile ca. 20 cm. alta, 6-7 cm. lata, 
brevi-acnminata, fere vel usque ad rhachin - pinnata ; pinnis proximis, 
adnatis nec basibus dilatatis, acutis, ca. 5 mm. latis, rectis vel subfal- 
catis, argute serratis vel rhachin versus integris, inferioribus valde deflexis, 
membranaceis, glaberrimis, nigro-viridibus ; venulis conspicuis, fere sem- 
per simplicibus; fronde fertile 15—24 cm. alta, 2.5—4, cm. lata, acuminata, 
pinnata; pinnis falcato-arcuatis, 2-3 cm. longis, 2 mm. latis, inferioribus 
remotis. 
In silva dumosa muscosa ad terram, 2,100 m. s. m. (No. 5960). 
The most similar species previously known from the Philippines is P. sten- 
optera (Hance) Diels, of China, Formosa and Luzon. 
PTE R IS Linn. 
Pteris quadriaurita Retz. 
In forests at 250 m. alt. (No. 5959), a very ample form, P. nemoralis Willd., 
I believe, common in this part of the World. A similar form from a deep ravine 
at 700 m. alt. (No. 5957). 
Pteris sp. near P. quadriaurita Retz., var. setigera. 
On cliffs in forests at 600 m. alt. (No. 5958). 
In the usually accepted sense, using P. quadriaurita as a catch-all, it will 
ihclude this plant, which is distinguishable from other forms by its caudate 
pinnae, narrow segments, basal basiscopic pinnules of several pinnae usually 
enlarged, prominent veinlets and chaffy stipes. 
