352 48. POLYPODIUM, NIPIIOBOLITS. 



bright-coloured, spread over the whole upper part of the frond, sunk in the tomen- 

 tum.. Hk. Sp. 5. p. 45. Gynosorium, Presl. 



Hab. Kaffraria, Natal, Zambesi-land, Angola, Guinea Coast. Very near the last, but 

 smaller and subsessile. 



290. P. (Niph.) alMcans, Mett. ; rhizome stout, clothed with rather large pale 

 lanceolate scales ; st. 2-4 in. 1., firm, erect, naked ; jr. 1-2 ft. 1., 1-2 in. br., nar- 

 rowed gradually towards both ends, the edge entire, revolute ; texture very coria- 

 ceous ; upper surface glabrous, lower densely clothed with ferruginous tomentum ; 

 veins immersed, hidden, the main ones distinct to the edge ; sori in close rows of 

 3 to 4 each between them. Hk. Sp. 5. p. 51. 



Hab. Java. This and the two next are the only densely-tomentose species that are 

 rigid in texture. 



291. P. (Niph.) distichocarpum, Mett. ; st. 5 in. 1., firm, erect ; barren fr. 10 

 in. 1., 1^-2 in. br., linear-oblong, narrowed to both ends ; fertile /r. 2 ft. 1., 1J 

 in. br., narrowed gradually from the middle to both ends ; texture subcoriaceous ; 

 upper surface nearly naked, lower tomentose ; main veins 4 lines apart, with the 

 sori in 2 rows between them, and 5 to 6 areolse between the midrib and edge. 

 Mett. Fil. Ind. 2. p. 231. 



Hab. Sumatra, Korthals. Most like the preceding, from which it may be known by 

 its biserial sori. 



292. P. (Niph.) americanum, Hk. ; rhizome very thick, clothed with large 

 spreading grey lanceolate scales ; st. strong, erect, 1-4 in. 1. ; fr. 1^-2 ft. L, ^-f 

 in. br., narrowed very gradually downwards, the edge reflexed ; texture very 

 coriaceous ; upper surface tomentose when young, naked, bright-green and pitted 

 when mature, lower densely coated with loose dirty-white woolly tomentum ; 

 veins quite hidden ; sori large, immersed, in single oblique rows of 4 between the 

 midrib and edge. Hk. Sp. 5. p. 54. 



Hab. Andes of Ecuador, Jameson, Spruce. Like the last in gener.il habit, but the 

 sori much larger and only uniserial between the main veins. The only American species 

 of Niphobolus. 



293. P. (Niph.) Gardneri, Mett. ; rhizome short-creeping, clothed with rigid 

 lanceolate black scales with a brown border ; st. 3-4 in. 1., firm, naked ; fr. 12-18 

 in. 1., 1-1J in. br., narrowed very gradually towards both ends, the edge entire ; 

 texture coriaceous ; upper surface naked, lower densely matted with grey tomen- 

 tum ; main veins straight ; the sori in close rows of about 4 each between them. 

 Hk. Sp. 5. p. 61. Ex. F. t. 68. 



Hab. Ceylon. Very like P. stigmosum in general habit, but the sori larger and the 

 tomentum thicker. 



294. P. (Niph.) penangianum, Hk. ; st. very short ; fr. 12-18 in. ]., 2-3 in. br., 

 the point acute, the lower part narrowed very gradually, the edge obscurely 

 undulated ; texture papyraceous ; upper surface naked, lower thinly clothed with 

 fine silky tomentum ; main veins very oblique, distinct to the edge, connected by 

 nearly straight veinlets ; the areolce with 3 to 4 sori in each, the rows close toge- 

 ther, confined to the upper part of the frond, and the mass falling distinctly short 

 of the edge. Hk. Sp. 5. p. 52 (not p. 13). Polycampium, Presl. 



Hab. Penang, Lady Dalkousie. 



295. P. (Niph.) Boothii, Hk. ; st. 1 ft. or more 1., firm, erect, with lanceolate 

 scales at the base ; fr. l|-2 ft. 1., 3-4 in. br., narrowed gradually towards both 

 ends, the edge entire ; texture coriaceous ; upper surface glabrous, lower with a 



