C. ALSOPIIILA. 35 



18. A. Poeppigii, Hk. ; "glabrous except the rachis above; pinnae closely 

 pinnated ; pinnl. elongated, sessile, oblong-lanceolate, much and suddenly acu- 

 minated, pinnatifid nearly to the costa ; lobes thick and coriaceous, crowded, 

 narrow-oblong, falcate, very obtuse, densely clothed with sori to the very apex ; 

 the margins slightly reflexed ; bullate scales none ; copious hairs among the 

 capsules." Hk. Sp.']. p. 43. A. villosa, Kze. not Pr. 



Hab. Peru, Poeppig, Ruiz et Pav. in Herb, nostr. This appears to me quite distinct 

 from the true Als. villosa, Kze. (which is the Chnoophora Humboldtii, Klf.), and more 

 allied to our Als. Gardneri. 



19. A. villosa, Pr. ; st. short, 1 ft. or more long, unarmed or only beset with 

 small, elevated, tubercular points, at the base densely clothed with ferruginous, 

 subulate, glossy scales 1| in. 1. ; Jr. coriaceous, bi-subtripinnate, glabrous above, 

 with a copious, lax, deciduous tomentumon both sides in the young state ; pinnl. 

 1-3 in. L, oblong-lanceolate, gradually but obtusely acuminate, more or less 

 deeply pinnatifid ; lobes oblong, obtuse, entire or coarsely serrated ; veins pin- 

 nated ; veinlets forked ; sori occupying nearly the whole space between the costule 

 and the margin ; capsules mixed with copious hairs. Hk. Sp. 1. p, 44. Cvathea, 

 H. B.K. Nov. Gen. 1. p. 24-7. t. 670. A. rigidula, Mart. Cr. Bras. t. 51. A. 

 Humboldtii, KL Chnoophora, Klfs. 



Hab. Tropical America ; New Granada, Brazil ; Venezuela, Fendler, n. 47 and 492 ; 

 S. Chili, Cuming, Capt. King. Well figured by U. B. K. and by Martius. 



20. A. plagiopteris, Mai-t. ; "fr. bSpinnato-partite ; st. aculeate ; partial rachis 

 and veins downy above ; scales on the veins few and deciduous ; pinnae linear- 

 oblong, acuminate ; pinnl. linear, much acuminated and pinnatifid ; lobes 

 between the rather broad sinuses lanceolate, falcate, toothed at 1 he apex; the 



fertile ones nearly entire, the sterile serrated ; in each pinnl. the lowest and 

 shortest lobe is obliquely adnate with the rachis ; sori upon all the segments 

 8-10." Mart. Cr. Bras. p. 73. t. 50. Hk. Sp. 1. p. 44. 



Hab. S. Brazil. Moore alludes to its affinity with his A. axillaris, Polypod. axillare, 

 Ead. Fil. Bras. t. 41, which is A. hirta, Klf., and which my specimens very much 

 resemble. 



21. A. armata, Presl ; fr. ample, tripinnatifid or tripinnate ; rachises stra- 

 mineous, densely pilose, not muricated ; pinnce oblong-lanceolate, l-g-2 ft. 1. ; 

 pinnl. ligulate-lanceolate, sessile, 3-5 in. L, |-1 in. br. ; segm. falcate, blunt, 

 1-1 \ lin. br., subentire or toothed ; texture moderately thick, not coriaceous ; both 

 si<lc.i, especially the lower, densely pilose on the ribs, not scaly ; veins 10-12-jug., 

 deeply forked ; sori subcostular. Hk. Sp. 1. p. 40. A. hirta, Kaulf. Hk. Sp. 

 Mart. Ic. t. 44. A- hirsuta, Kunze, Hk. Sp. 1. p. 45. A. Swartziana, Mart, 

 t. 49. A. aculeata, Klotzsch. Cyathea bicrenata, Liebm. _ 



Hab. Throughout the whole of Trop. America one of the commonest species. 



22. A. niff-ra, Mart. ; st. rather slender, aculeated and as well as the principal 

 rachises ebony-black ; fr. deep green, submembranaceous, sparsely hairy on the 

 costse and costules, rarely with a few deciduous scales beneath ; prim, pinnce 

 12-14 in. 1., 4-5 in. w. ; pinnl. 2-2% in. L, ^ in. w., oblong, shortly acuminate, 

 deeply -f of the way to the costa pinnatifid, subpetiolate ; lobes oblong, obtuse, 

 crenato-serrate ; veins simple or forked ; sori intermediate between the costule 

 and the margin. Mart. Cr. Bras. p. 71. t. 47. Hk. &^ . \.p. 45. 



Hab. Rio Negro, Brazil. It were to be wished that many other S. American Alsophtlce 

 were as readily distinguished as this. 



23. A. raclens, Klf.; " caud. 3 ft. high, 3 in. diam. ; st. 2-3 ft. 1., clothed 

 with ovate, acuminated, pale brown scales, below together with the ramifica- 

 tions aculeate, above more densely paleaceo-suhvillous ; fr. membranaceous, 

 lanceolato-ovate, bipinnatisect ; prim, sc>jtn. at length deciduous, Ij ft. 1., 



