40 ADIANTUM. 



Hab. Brazil, St. Calhaiiiie's, Chamiiso, Raddi (in Herl>. noslr.) ami 

 others. Orj^an Mountains, near Rio, G^an/«e)-,7J. 196. South Brazil, k*?e/- 

 low, Ttceedie. Uraguay, J- Baird. — Certninly allied to A. jEtkiopicum, 

 but the pinnules are invariably cuneated and the lobes deep (so that the 

 sori are placed higher up on the lobes than the base of the sinuses of the 

 lobes), and the two segments of the soriferous lobes are always so narrow 

 and so incurved as to conceal the fissure, well represented in the Ic. Fil. Rar. 

 It is rather a small species; the largest specimen I have is 12 — 14 inches 

 long : the more usual size is as given in Langsdorfl"and Fischer, and in the 

 Ic. Fil. above quoted. I have seen the true form of this plant only from 

 Brazil ; and it is very constant to its characters. The name has been ap- 

 plied to Adianta of other countries, which have appeared to me different. 



81. A. glaticopJtylliwi, Hook. ; tall frond ovale siij^rade- 

 conipouiidly pinnated, pinnules rigid chartaceous glabrou.s 

 glaucous on both sides on rather long slender petioles cuneate 

 (generally narrowly so) su])erior margin rounded 2 — 4-lobed, 

 lobes obtuse emarginate or bifid their segments falcately 

 incurved connivent, sinus or cleft of each lobe soriferous, 

 sori rather small, involucres orbicular-cordate subcoriaceous 

 when old, stipes and slender rachis everywhere ebeneous 

 glossy glabrous. A. cuneatum, var. an gusli folium ; Marl, 

 and Galeot. Fil. Mex. p. 70. 



Hab. Cordillera of Mexico, inhabiting the cold region, at an elevation of 

 9000 to 10,500 feet above the level of the sea, Galeotii, n. 6266, and 6359 

 (the latter with narrower and more rigid almost coriaceous pinnules), and 

 n. 6566; Pic d'Orizaba, 9750 feet; Linden, n. 48; Jurgensen, n. 322; 

 Air. Parldmon. " Teapisca (Chiapas)," Linden, n. 1550. Veragnas, Central 

 America, Seemann. — M M. Martens and Galeolti referred their two Adi- 

 anta from Mexico, n. 6226, and n. 6359 to the A. cuneatum of Langsdorfl" 

 and Fischer, as narrow pinnuled varieties; and I was disposed to do the 

 same, until I observed that my Mexican specimens, from seven difierent 

 localities as far as I can judge, all agreed in being of a larger size and 

 more compound than that species, with narrower, more rigid, and always 

 glaucous pinnules, together with a less deep and narrow notch for the re- 

 ception of the sori ; and not only do they thus accord in the respective 

 characters, but I have not seen anything to correspond with them anywhere 

 but from Mexico and adjacent regions ; certainly no such appearances are 

 exhibited by any of the true Brazilian A. cuneatum. I think it will prove 

 a good species (nearest, perhaps, to the A. renusium, Don, of the East 

 Indies), which like many other ferns, is very difficult to be defined by words : 

 the eye readily distinguishes it. 



82. A. venusium, Don ; rather small ovate tripinnate, pin- 

 nules firm membranaceo-chartaceous glabrous and slightly 

 glaucous beneath shortly j^etiolulate obovato-cuneate rarely 

 subrhombeo-aciuninate striated the superior margin rounded 

 scarcely ever or but slightly 2 or 3-lobed finely dentato-ser- 

 ratc, fertile lobes with 2 rarely 3 notches each notch bearing 



