400 60. ACROSTICIIUM. 



§ Veins free. Sp. 1-87. 



* Elaphoglossum, Scliott. Fronds simple. Sp. 1-Go. Fig. 60. a, b. 



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



Sp. 1-19. 



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

 blac.k ; st. 4-6 in. 1., firm, slender, erect ; barren fr. 2-3 in. 1., |-| 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. 21-3 in. I., 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.—lLike the last, but the frond 

 not caudate, and the scales different. 



3. A. micradenium, 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. 1., 1-1| 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. 21G. E. nitidum, Brack, t. 9. A. pellucidum, Gaud. Atl. Bon. 

 t. 79. fg. 5-7. 



Hab. Sandwich Isles. ^ 



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

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

 |-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. — jS, 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. 1., \ in. br., on long slender naked stems 

 1 ft. \.—Hk. Sj). 5. p. 214. 



Hab. British Guiana, Schombu7%fJc. 



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

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

 0-8 in. 1., \-^ 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- 

 stalked similar fertile one. 



st 



