30. PELLiEA, §§ ALLOSORUS. 147 



10. P. Skinneri, Hk. ; st. 6-0 in. 1., stout, erect, straw-colour or pale-brown, 

 naked or slightly fibrillose ; /r. 6-12 In. 1., 4-8 in. br., deltoid, tripinnatifid ; 

 lower pinnae deltoid ; lowest pinnl. 1-2 in. 1., 1 in. br., deltoid-acuminate, cut 

 down neaily to the racliis into broad oblong acuminate lobes ; rachis slightly 

 toraentose, both surfaces naked ; texture scarcely coriaceous ; veins fine, incon- 

 spicuous ; invol. narrow, membranous. — Hk. Sp. 2. p. 141. 1. 118. B. 



Hab. Gnatemala ; discovered by Mr. Skinner ; and much finer Specimens .have recently 

 been gathered by Messrs. Salvin and Godman. 



11. P. rigida,Yl'k.; St. 4-6 in. 1., stout, erect, dark chesnut-brown, naked or 

 slightly scaly ; fr. 4-9 in. 1., 3-6 in. br., deltoid, bi- or tripinnate ; lowest pinnw 

 the largest, erect, patent, 3-4 in. 1., subdeltoid ; pinnl. of the lower side larger 

 than the others ; ult. segm. linear-oblong, obtuse, decurrent at the base, J-^ in. 1. 

 in the barren frond, 1^2 lin. br. ; rachis naked or slightly scaly, both surfaces 

 naked or slightly hairy ; texture subcoriaceous ; veins close and fine ; sori in a 

 continuous marginal line, the broad pale wrinkled inyol. roUed down tightly over 

 ii.—Ek. Sp. 2. p, 144. Cheiloplecton, Fee. 



Hab. Mexico, Guatemala, and said to have been also found by M. Nee in Peru. 



§§ Allosorus, Presl. Texture coriaceous ; the veins not perceptible ; the ultimate 

 segments of the frond at least twice as long as broad, often reeolute at the margin; 

 invol. broad, conspicuous. Sp. 12-32. 



* Frond not more than bipinnately cut. Sp. 12-21. 



12. P. (Alio.) ambigua, Baker ; st. 6-9 in. 1., wiry, erect, polished, dark chesnut- 

 brown, naked ; /;•. 4-6 in. 1., 2-3 in. br., oblong, simply pinnate, or bipinnate 

 at the base ; pinnw lg-2 in. 1., 1 lin. br., linear, erecto-patent, flexuose ; texture 

 subcoriaceous, brittle ; rachis and both surfaces naked, margin incurved ; invol. 

 distinct from it, papyraceous, brown, continuous, mapped out into a series of 

 roundish depressions, the two opposite edges interlacing by a marginal fringe, 

 and sometimes concealing the dark-coloured polished midrib. — Cheil., Metten. 

 Cheil. p. 49. Synochlamys ambigua, Fee, 8. Mem. t. 20. 



Hab. Kew Granada ; discovered by M. Scblim in 1852. 



13. P. (Alio.) atropurpurea. Link; si. tufted, 3-4 in. 1., rigid, erect, more or 

 less tomentose ; fr, 4-12 in. 1., 2-6 in. br., varying from lanceolate and simply 

 pinnate to ovate-lanceolate, with deltoid pinnw 2-3 in. 1., with several pinnl. on 

 each side, the latter nearly sessile, 1-2 in. 1., at most J in. br., entire or sharply 

 auricled at one or both sides at the base ; texture coriaceous ; rachis tomentose 

 like the stipe ; both surfaces naked, except the costa beneath ; veins hidden ; invol. 

 formed of the slightly altered incurved edge of the pinnules, at length nearly 

 hidden by the broad line of the fruit. — Ilk. Sp. 2. p. 139. P. glabella, Mett. 



Hab. N. America, from sub-arctic latitudes southward to Texas, the Eooky Moun- 

 tains, and British Columbia ; Orizaba, Mexico, Baurgeau; Andes of Mecoya, 8-10,000 ft., 

 Pca/rce. 



14. P. (Alio.) pectiniformis. Baker ; rhizome stout, short- creeping ; st. 2-6 

 in. 1., terete, ebeneous, naked or slightly scaly ; basal scales dense brown, fibril- 

 lose ; fr. lanceolate, ^-1 ft. 1., 2-3 in. br., mostly simply pinnate ; pinnm narrow, 

 ligulate, 1 lin. br., entire, with revolute margins, blunt, base cordate, obscurely 

 stalked ; rachis rigid, strong ebeneous, clothed with adpressed linear membranous 

 scales ; texture rigidly coriaceous ; surfaces green, glabrous ; veins immersed ; 

 inv. pale, firm, glabrous. — Pteris pectiniformis, Godet, Kuhn, Fil. Afr. p. 87. 

 Pellsea dura, edit. 1. ex parte. 



^Hab. Natal, Angola, Mascaren Isles. 



