352 48. POLYPODIUM, §§§§§§§§ NIPIIOBOLUS. 



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

 tum. — Hh. Sp. 5. p. 45. Gynosorium, Presl. 



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

 Olmaller and subsessile. 



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

 lanceolate scales ; St. 2-4 in. 1., firm, erect, naked ; fr. 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. — Hi. Sp. 5. p. 51. 



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

 rigid in texture. 



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

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

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

 upper swrface 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 he 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. 1., J-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, Spt-ace. — Like the last in general habit, but the 

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

 of Niphobolws. 



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-lJ 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. 51. Ex. F. t. 68. 



Hah. Ceylon. — ^Very like P. stigmoavm, in general habit, but the sori larger and the 

 tomentum thicker. 



294. P. (Niph.) penanffianum, Hk. ; st. very short ; fr. 12-18 in. 1., 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 a/reolas 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 Dcdhousie, 



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

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

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



