_ 



(4-J 



400 60. ACROSTICHUM. 



Veins free. Sp. 1-87. 

 * Elaphoglossum, Schott. Fronds simple. Sp. 1-65. Fig. 60. a, b. 



f Both surfaces of the barren frond nearly or quite naked, the edge not fringed. 

 Sp. 1-19. 



1. A. petiolosum, Desv. ; rhizome woody, the scales dense, fibrillose, nearly 

 blaqk ; st. 4-6 in. L, firm, slender, erect ; barren fr. 2-3 in. 1., f-f in. br., ovate- 

 oblong, narrowed suddenly to a point, which is sometimes 1 in. 1. ; texture cori- 

 aceous ; both sides nearly naked ; veins immersed, subparallel ; fertile fr. smaller 

 than the barren one. Hk. Sp. 5. p. 207. A. caudatum, Hk. Ic. t. 215. 



Hab. Ecuador and Peru. Well marked by the small size and very distinct caudate 

 apex of its fronds, and the rigid nearly black scales of the rhizome. 



2. A. tambillense, Hk. ; rhizome stout, the scales dense, linear, crisped, chesnut- 

 brown; st. tufted, 2-3 in. 1., firm, slender, naked; barren fr. 2^-3 in. 1., 1-1 

 in. br., the point cuspidate, the base rounded or even slightly cordate ; texture 

 coriaceous ; both sides quite naked ; veins distant ; fertile fr. considerably smaller 

 than the barren one. Hk. Sp. 5. p. 207. Ic. t. 856. 



Hab. Ecuador, Jameson; Guatemala, Salvin & Godman. Like the last, but the frond 

 not caudate, and the scales different 



3. A. micradcnium, Fee ; rhizome slender, wide-creeping, the scales small, linear- 

 subulate, squarrose, dark chesnut-brown ; st. 1 in. or more apart, 3-6 in. 1., firm, 

 erect, naked, stramineous ; barren fr. 5-6 in. L, 1-1 J in. br., the point acuminate, 

 the base narrowed gradually ; texture herbaceous ; both sides naked ; veins raised, 

 conspicuous, usually once forked ; barren fr. much smaller than the fertile ones. 

 Hk. Sp. 5. p. 216. E. nitidum, Brack, t. 9. A. pellucidum, Gaud. Ail. Bon. 

 t. I'd. fig. 5-7. 



Hab. Sandwich Isles. 



4. A. simplex, Sw. ; rhizome woody, short-creeping, the scales rather large, 

 lanceolate, dark-brown ; st. 1-4 in. L, firm, erect, naked ; barren fr. 4-12 in. L, 

 f-1^ in. br., the point very acute, the lower part narrowed very gradually ; tex- 

 ture coriaceous ; both sides quite naked ; margin distinct, cartilaginous ; veins 

 immersed, usually once forked ; barren fr. narrower than the fertile one, and on 

 a longer stem. Hk. Sp. 5. p. 205. /3, A. martinicense, Desv. ; fronds narrower, 

 very coriaceous, Hk. Sp. 5. p. 218. A. durum, Kze. E. glabellum, J. Sm. 



Hab. Cuba to Brazil. Characterized by its firm fronds, narrowed very gradually to 

 both ends. A plant gathered by Barter at Sierra Leone probably belongs here. 



6. A. nigrescens, Hk. ; caud. stout, erect, not scaly ; barren fr. tufted, sub- 

 sessile, 6-9 in. 1., in. br., the point bluntish, the base narrowed very gradually ; 

 texture coriaceous ; both sides naked ; veins simple or once forked, distant, not 

 reaching the edge ; fertile fr. 2-3 in. L, \ in. br., on long slender naked stems 

 1ft. L Hk. Sp. 5. p. 214. 



Hab. British Guiana, Schomburglc. 



6. A. leptophyllum, Fee ; rhizome firm, creeping, the scales " soft, fulvous ; " 

 st. of barren frond 3-4 in. 1., firm, erect, stramineous, nearly naked ; barren fr. 

 6-8 in. L, - in. br., the point bluntish, the lower part narrowed gradually ; tex- 

 ture subcoriaceous ; both sides naked ; veins fine, rather raised, simple or once 

 forked ; fertile fr. similar to the other, but the stem three or four times as long. 

 Hk. Sp. 5. p. 218. 



Hab. Venezuela and Brazil. Characterized by its ligulate barren frond and very long- 

 stalkecl similar fertile one. 



