31. PTEKIS, §§§§§§ LITOBHOCHIA. 169 



Hab. Discovered at or near Elephants' Bay, West Tropical Africa, by the late Dr. 

 Curror, and fiae specimens were procnred on the mountains of Fernando Po at 3-500 ft., 

 by Gnstave Mann. — /3, which is not unlikely a distinct species, was gathered on the 

 Niger expedition by Barter, who describes the rhizome as creeping. This comes very 

 near Ltynchitis in textnre, and the s&ri are often only reniform, and show a decided 

 preference for the sinuses. 



66. P. (Lite.) denticulata, Swartz ; St. about 1 ft. 1., slender, wiry, naked ; 

 fr. 12-24 in. 1., 8-12 in. br. ; upper pinn<E smt'pXe, linear, 4-6 in. 1., ^f in. br., 

 Tinited at the base, finely spinuloso-serrated when barren, those next in order 

 quite cut down to the rachis and forked, the lower ones often pinnatifid with 

 several linear jnnnnl., especially on the lower side ; tertMre.subcoriaceous ; veins 

 fine, anastomosing copiously ; rachis and both surfaces naked ; sori not quite 

 leaching the point of the pinnules. — Hk. Sp. 2. p. 215. Hh. & Gr. t. 28. — 

 j8, P. brasiliensis, Raddi ; pinnw broader, 6-9 in. Ij, 1 in. br., more compound. — 

 Hi. Sp. 2. p. 214. 



Hab. Tropical America, from the West Indies southward to Brazil. — The typical form 

 much resembles cretica in general aspect. 



67. P. (Lito.) Hcen&eana, Presl ; St. 1-3 ft. 1., pale, firm, naked ; /r. several 

 ft. 1., the upper part with numerous, simple, linear pinnw on both sides, which 

 are 6-9 in. 1., 1-1^ in. br., acuminate at the point, narrowed gradually towards the 

 base, the lower ones slightly stalked and about 2 in. apart, the barren ones 

 finely spinuloso-serrated, the lower pinnee often 1 ft. or more 1., spreading with 

 numerous similar pinnl.; texture coriaceous ; rachis and both surfaces naked ; 

 veins fine, clearly visible, anastomosing copiously ; sori not quite raaching the 

 point of the pinnules. — Hk. Sp. 2. p. 213. 



Hab. Tropical America, from Guatemala and New Granada southward to Peru. 



68. P. (Lito.) pulchra, Schlecht. ; St. strong, erect, naked, polished, straw- 

 coloured ; fr. ample, simply pinnate above, with numerous sessile linear, 

 acuminate pinnae on each side, which are 4-6 in. 1., ^f in. br., slightly serrated 

 towards the point, lower pinnae simply pinnate, 1 ft. or more 1., 6-9 in. br., 

 nearly opposite, 1 in. or more apart ; texture coriaceous ; rachis and both 

 surfaces naked ; veins fine and numerous ; sori not extending to the apex of the 

 pinnules, ultimately concealing the invol. — Hk. Sp. 2. p. 213. P. mexicana, Fie. 



Hab. Mexico, ascending to 6,000 feet. 



69. P. (Lito.) macroptera. Link ; st, 1 ft. or more 1., erect, naked, polished, 

 straw-coloured or brownish ; fr. 2 ft. or more 1., 12-18 in. br., cut down very 

 nearly to the rachis in the upper part into numerous linear lobes, the lowest 

 of which are 6-9 in. 1., ^ in. br., with about 1 in. between them at the base, the 

 point narrowed very gradually and very faintly toothed when barren ; lat. 

 pinnce iew, often a single pair only, like the terminal one, but smaller ; teicture 

 papyraceo-herbaceous ; rachis and both surfaces naked ; veins fine but con- 

 spicuous ; sori not reaching the apex of the segments. — L. angustata. Fee. 



Hab. Brazil, Bwchell, &c. 



70. P. (Lito.) vestita. Baker ; st. slender, erect, 1 ft. or more I., villose when 

 young, straw-coloured or brownish ; fr. 18-24 in. I. ; terminal pinna 12-15 in. 1., 

 2^ in. br., cut down to a broadly-winged rachis into numerous lobes on both 

 sides, the upper ones close, the lower ones 1^ in. 1., f in. br., falcate with a space 

 between them ; lateral pinnae two on each side (in our specimens), spreading, 

 like the terminal one but smaller, caudate at the point ; main rachis and those 

 of the pinnse densely villose ; both surfaces hairy ; veins fine, anastomosing 

 copiously ; sori confined to the inner two-thirds of the segments ; invol. con- 

 sisting principally of a 'dense fringe of strong hairs. 



Hab. Peru, Spruce, 4063. — Habit most like the next, but the pinnse much larger and 

 fewer. 



