408 GO. ACROSTiciirM. 



**** Surface of the frond densely scaly. Sp. 4G-Go. 



A. Fronds 1-4 inches lonj. Sp. 4G-52. 



40. A. ovatum. Ilk. ; rhizome filiform, very wide-creepina:, with slender filnil- 

 lose bright-brown scales ; st. distant, j-J in. I., clothed with spreading scales ; 

 barren fr. i-| in. 1., ^-J in. br., roundish or broadly ovate ; texture subcoria- 

 ceous ; both sides often densely clothed with fimbriated feiTUginous scales ; 

 veins hidden ; fertile fr. the largest, and on longer stems. — Hk. Sp. o. p. 228. 

 Hk. 8f Gr. t. 140. 



Hab. Mexico to Ecuador and South Brazil. — Best distinguished from the small forms 

 of spathulatum by its wide-creeping rhizome. 



47. A. procurrens, Mett. ; rhizome slender, wide-creeping, with squarrose 

 linear-subulate bright-brown scales ; st. 0-1 in. 1., slender, ciliated ; barren fr. 

 1-3 in. 1., |-f in. br., spathulate, the point blunt, the haft narrowed very 

 gradually ; texture subcoriaceous ; both sides scattered over and the edge ciliated 

 with long, linear, dark chesnut-brown scales ; veins distant, slender ; fertile fr. 

 much smaller than the others. — Hk. Sj). 5. x>. 22G. 



Hab. Cuba, Fendler, 793. — ]\Iost likely a small form of villosum. The scales of the 

 frond are the same, but that has the stems tufted. 



48. A. spathulatum, Bory ; st. densely tufted, 1-2 in. 1., firm, erect, clothed with 

 soft spreading brown fibrillose scales ; barren fr. ^-4 in. L, \-\ in. br., obovate- 

 spathulate, the point blunt, the base tapering narrowly or gradually ; texture 

 coriaceous ; both sides scattered over and the edge usually densely ciliated with 

 small linear-subulate reddish-brown scales ; veins hidden ; fertile fr. smaller 

 than the other and the stem longer.— A. piloselloides, Presl. Hk. Sp). b. p. 227. 

 Fil. Ex. t. 29. 



Hab. Cuba and Mexico to Brazil and Peru ; Tristan d'Acunha, Ceylon, Natal, Mais- 

 caren Isles. — A.ohtusatum, Carm. Hk. & Gr. t. 22, from Tristan d'Acunha, and A. Rad- 

 dianum, Hk. & Gr. t. 4, are forms, the latter with the stem especially densely clothed with 

 dark-brown fibrillose scales, and the frond 3-4 in 1., \ in. br. 



49. A. Matthcwsii, Fee ; rhizome woody, wide-creeping, the scales small, 

 dense, linear, nearly black ; st. 2-3 iu. 1., wiry, clothed'throughout with small 

 lanceolate scales, nearly black in the middle, with a grey border ; barren fr. 

 2-3 in. 1., \-^ in. br., both ends narrowed gradually ; texture coriaceous ; scales 

 small, dense, peltate or ovate, brown or nearly black in the middle, with a pale 

 sometimes silvery border ; vei7is hidden ; fertile fr. larcrer than the others, on 

 longer stems. — Hk. Sp. b.p. 230. A. Hartwegii, Fee, Hk. I. c. 



Hab. Andes, from Mexico to Peru. — This should probably be regarded as a more 

 Bcaly variety of A. Huacsaro, with which it agrees in texture and mode of growth. 



50. A. assurgens^ Baker ; rhizome woody, often 1-2 ft. 1., clothed with slender 

 squarrose subulate dark-brown scales; st. distant, those of the barren fr. 2-3 in. 1., 

 fibrillose throughout; barren fr. 3-4 in. 1., ^-f in. br., the point blunt, the base 

 narrowed gradually ; texture coriaceous, the edge inflexed, the upper surface 

 clothed with minute peltate furfuraceous scales, the lower scaly on the elevated 

 midrib throughout ; veins simple ; fertile fr. like the barren one, but the stem 

 longer. — A. acrocarpon, Hk. Sp. 5. p. 208, ex pjarte, non Mart. 



Hab. Andes of N. Granada, Ecuador. — The fronds of this are like those of the last in 

 texture and shape, but are not scaly over the surface beneath. 



51. A. succisoc folium, Thouars ; rhizome woody, the scales dense, linear- 

 subulate, nearly black ; st. 2-3 in. 1., firm, erect, densely clothed with spreading 



