400 60. ACROSTIOHUM. 



§ Veins free. Sp. 1-87. 



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



t Both surfaces of the iarren frond nearly or quite naked, the edge not fringed. 



Sp. 1-19. 

 . 1. A, petioloswm, Desv. ; rhii:ome woody, the scales dense, fibrillose, nearly 

 blaqk ; st. 4-6 in. 1., firm, slender, erect ; barreti 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. — HL 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. tambillerise, 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-lJ 

 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. 866. 



Hab. Ecuador, Jameson; Guatemala, Saliiin & Godman.—JAke the last, but the frond 

 not caudate, and the scales different. 



3. A. micradeniwn, 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. 6-6 in. 1., 1-lJ 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. Atl, Bon. 

 t. 19. fig. 5-7. 



Hab. Sandwich Isles. 



4. A. simplex, Sw. ; rUzoriie 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.— 2?^. Sp. 6. p. 206.— /3, A. martinicense, Desv. ; fronds narrower, 

 very coriaceous, Hk. Sp. 5. p. 218. A. durum, HTge. 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., i in. br., on long slender naked stems 

 lit.l.— Hk.Sp. 5. p. 2U. 



Hab. British Guiana, Schom!mi>gJc. 



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. 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 lone. 

 ~Hk. Sp. 6. p. 218. ^ 



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

 stalked similar fertile one. 



