POLYPODIACE.E. 253 



Hab. Sandwich Islands; in humid forests, creeping over the trunks 

 of trees. 



Bootstock creeping and pubescent, stout in proportion to the size 

 of the fronds ; the rootlets tomentose with a dense coating of short 

 black hairs. Stipe flattened, about half an inch in length, smooth, 

 with a narrow margin, which increases in breadth towards the base 

 of the frond. Fronds broad-lanceolate, glabrous, 2 inches and upwards 

 in length, by 8 to 10 lines broad, of a pale green colour, deeply 

 bipinnatifid at the base ; the primary divisions somewhat rhombic-omfe 

 and less deeply divided: lacinice short, nearly oblong, obtuse, simple, 

 or else bifid or bidentate. Khachis and veins stout and of a dull- 

 brown colour. Indusium supra-axillary, subcylindrical, immersed, about 

 half its length, attenuated at the base, Hie mouth spreading, scarcely two- 

 lipped, its diameter nearly equal to the length; the wings on the 

 outer side sometimes wanting. Receptacle filiform, exserted about 

 twice the length of the indusium. 



Belated to the preceding species ; but readily distinguished by its 

 only partially immersed indusium, with a more spreading mouth, and 

 by the absence of a thickened margin to the frond. 



Plate 36. — Fig. 3. Portion of a plant, of the natural size. 3 a. 

 View of a portion of a frond underneath, slightly magnified. 



10. Trichomanes melanorhizon, Hook. 



Trichomanes melanorhizon, Hook. Spec. Fil. 1, p. 140. 



Hab. Mountains, near Banos, Luzon, Philippine Islands. 



Plant very small, growing in the crevices of wet rocks, in deeply 

 shaded situations. Fronds broadly ovate, tripinnatifid, and, together 

 with the stipe, a little over an inch in height. 



Hooker describes the fronds as "pinnate; pinnae bipinnatifid." 

 But we find the margin of the pinnae to be decurrent on the rhachis, 

 in our smaller specimens, so that the species may be considered as tri- 

 pinnatifid. 



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