PTERIDOPHYTA HALCONENSES. 
139 
Polypodium tenuisectum Bl. 
On ridges in the mossy forest 2,200 to 2,500 m. alt. (No. 5978). 
Already known from the Philippines, from Mount Apo, Mindanao, and Mount 
Canlaon, Negros. 
Malay to Samoa. 
Polypodium Yoderi Copel. 
With the preceding (No. 5977). Hitherto known only from the type collec- 
tion from Mount Madiaas, Panay. 
Polypodium papillosum Bl. 
On boulders in forests at 800 m. alt. (No. 5979) ; very large specimens. 
Malaya. 
Polypodium (Goniophlebium) integriore Copel. n. sp. 
Rhizomate lignoso repente 3-4 mm. crasso, paleis castaneo-fulvis lan- 
ceolato-acnminatis 4 mm. longis vestito vel glabrescente et non calcareo ; 
stipite glabro 15-25 cm. alto, stramineo-brunneo ; fronde ca. 50 cm. alta ; 
pinnis linearibus, 20 cm. longis, 15 mm. latis, sub apice valde caudata 
vix serrulatis aliter integris vel crenulatis, glabris, membraneceis, basibus 
anguste acuminatis, omnibus stipitatis; venis nigris, seriebus areolarum 
ca. 3; soris grandibus, leviter immersis. 
Ad montem Haleon, epiphyticum 2,200 m. s. m. (No. 6005). 
Nearly related to P. persicifolium Desv., which as at- present construed 
seems to me to include two or more species. P. integriore can be recognized 
by its narrow, almost entire pinnae, stalked, and with narrow bases. P. persi- 
cifolium occurs on Mount Apo 6 which is its most northern known habitat. 
The Apo form is much larger than the Javan, and membranaceous. 
Polypodium (Goniophlebium) verrucosum Wall., has previously been col- 
lected on the Baco River, near the base of Mount Haleon by McGregor (No. 
253). It differs from the preceding most conspicuously in its small and 
deeply immersed sori which resemble those of P. papillosum Bl. 
Polypodium (Goniophlebium) subauriculatum Bl. 
Epiphytic on mossy trees at 1,400 m. alt. (No. 6004). 
These specimens are remarkable for the very coarsely serrate, strongly 
acuminate pinnae, and for the very tardy and incompletely deciduous dense 
clothing of scales on the rachis. In the latter respect our Philippine plants 
usually differ from the Javan. This species is in urgent need of analysis. 
Polypodium nummularium Mett. 
Epiphytic on mossy trees at 1,800 m. alt. (Nos. 5994, 5995). 
Hitherto known only from Luzon, on the mountains about Laguna de Bay. 
Some specimens with fronds fertile towards the apex, but with broad sterile 
bases suggest P. accedens, and unmistakably approach P. Whitfordi Copel., of 
Mount Mariveles. This resemblance is strong enough thoroughly to establish 
the affinity of P. nummularium and P. Whitfordi. In Luzon both species are, 
as far as known, very stable and distinct in form. Regarding these species as, 
like our fern flora as a whole, migrants towards the north, Haleon may be 
regarded as the point of origin and separation; they being so distinct in Luzon 
that their close affinity escaped suspicion is to be ascribed to their (however 
recent) isolation there. 
Copeland: This Journal (1906) Suppl. 1: 162. 
