408 60. ACROSTICHUM. 



**** Surface of the frond densely scaly. Sp. 46-65. 

 A. Fronds 1-4 inches long. Sp. 46-52. 



46. A. ovatum, Hk. ; rhizome filiform, very wide-creeping, with slender fibril- 

 lose bright-brown scales ; st. distant, J-J in. 1., clothed with spreading scales ; 

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

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

 veins hidden ; fertile fr. the largest, and on longer stems. Hk. Sp. 5. p. 228. 

 Hk. Sf 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-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. Sp. 5. p. 226. 



Hab. Cuba, Fendler, 793. Most likely a small form of vittosum. 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. 1., \-\ 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. 5. p. 227. 

 Fil.Ex.t.W. 



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

 caren Isles. A.obtmatum, 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., 5 in. br. 



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

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

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

 2-3 in. 1., |-f 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 ; veins hidden ; fertile fr. larger than the others, on 

 longer stems. Hk. Sp. 5. p. 230. A. Hartwegii, Fee, Hk. I. c. 



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

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



50. A. acrocarpon, Mart. ; 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., J- 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. Hk. Sp. 5. p. 208. 



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

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



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

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



