CO. AcnosTJCiiuM. 403 



IT;ih. Trinidad and Guiana. — Differs only from A. latifolium by its Idunter fronds of 

 subspathulato outline, with the edge slightly scaly. 



18. A. Sieberi, Hk. & Gr. ; rhizome stout, woody, the scales | in. 1., linear- 

 subulate, nearly black ; st. 3-(3 in. 1., firm, erect, stramineous, hardly at all 

 scaly ;//•. 3-12 in. 1., 1-3 in. br., the lower part narrowed very gradually, the 

 edge cartilaginous, entire ; texture coriaceous ; veins immersed, usually once 

 {tjvked ; fertile /r. smaller than the barren one. — Hk. /Sp. 5. p. li)7. H. & G. 

 t. 237. 



Hab. Mauritius and Bourbon ; and a similar plant, but with shorter and browner 

 scales, gathered by Mann at Fernando Po. — This has quite the habit of the next, but 

 the scales are different. 



19. A. latifolium, Sw. ; rhizome ihicV, woody, often creeping, the scales lan- 

 ceolate, crisped, dark or light-brown ; st. 6-12 in. 1., firm, erect, stramineous, 

 naked or slightly scaly ; barren fr. 0-18 in. 1., 2-4 in.br,, the point acute, the 

 lower part narrowed gradually, the edge entire, thickened and cartilaginous ; 

 texture very coriaceous ; both sides naked or nearly so ; fertile fr. considerably 

 narrower than the barren one. — Hk. Sp. 5. p. 202. 



Hab. Mexico and Cuba to Brazil and Peru. — From this we cannot distinguish clearly 

 A. lon(j if (ilium, Jacq., A. Sartorii, Liebm., A. Blanchetii and Tovarcnse, Mett., A. scal- 

 jieUum, Mart., A. alismcefoUum, Schomburgkii, Funckii, and andicola, F4e, and the 

 Javan A. callcvfolium of Blume. A plant from the Seychelles is probably the same. 



** Both surfaces nearly or quite naked, the edge of the frond fringed. 

 Sp. 20-24. 



20. A. stramineum, Mett. ; rhizome short, stout, the scales lanceolate-subulate, 

 often ^ in. L, bright-brown ; st. 5-9 in. 1,, stramineous, finally naked ; barren fr. 

 3-5 in. 1., |-1^ in. br., narrowed gradually to both ends ; texture subcoriaceous ; 

 the margin ciliated but the scales deciduous ; fertile fr. \\-2 in. 1., -^-f in. br., 

 the St. 2-4-^- in. I.— Mett. Fil. Nov. Gran. p. 200. 



Hab. N. Granada, Lindig, 251. — Very near the next species. 



21. A. melajtopus, Kze. ; rhizome short-creeping, densely clothed with small 

 reddish-brown linear scales ; st. 2-3 in. 1., densely clothed with linear spreading 

 dark chesnut-brown scales ; barren fr. 5-8 in. 1., 2 in. br., the apex acuminate, 

 the base rounded or subcuneate ; texture coriaceous ; veins lax, the margin 

 ciliated with similar scales ; fertile fr. 3-4 in. 1., | in. br., on a longer stem. — 

 Mett. Fil. H. Lips. p. 19. t. 1. 



Hab. Venezuela. — This comes near the small forms of the next, and there are a few 

 scales on the lower part of the midrib beneath. 



22. A. hi/hridiim, Boiy ; rhizome woody, the scales dense, j-| in. 1., linear, 

 crisped, dark chesnut-brown ; st. subtufted, 6-9 in. 1., firm, erect, with scattered 

 squarrose linear dark scales ; barren fr. 6-12 in. 1., 1^-2 in. br., the point 

 acuminate, the base rather rounded ; texture subcoriaceous ; both sides naked 

 except the midrib beneath, the edge ciliated with linear-subulate scales ; veins 

 immersed, usually once forked ; fertile fr. much smaller tlian the others. — 

 /3, A. Vulcaiii, Leperv. ; fr. ovate-oblong, cuspidate, 3-4 in. 1., 1^ in. br. — Hk. 

 *S>. 5. p. 210. 



Hab. Mascaren Isles, Natal, Tristan d'Acunha, Cameroon Mountains, Fernando Po, 

 Mexico to Brazil. — The scales here are from 1 to 1^ line long, and often fall quite away 

 as the frond matures, A. Lindbergii, Mett., from Brazil, appears to be identical with 

 this. 



23. A. dccurrens. Desv. ; rhizome woody, the scales large, ovate, dull-brown ; 



