60. ACROSTICHUM. 409 



linear scales, dark chesniat in the centre, grey at the edge ; ban-en fr. 3-4 in. I., 

 1-1 J in. br., blunt at both ends ; texture coriaceous ; both sides densely clothed 

 with pale-brown linear scales ; iieins liidden ; fertile fr. smaller than the other 

 and on a much longer stem.— ^. Sp. 5. p. 241. Si. S <?r. t. 2. 



Hab. Tristan d'Aounha, and reported also from Bourbon and Mamitias. — Habit of 

 A. conforme. 



B. Fronds 6-18 inches long. Sp. 52-65. 



62. A. cinnamomeum. Baker ; rhizome short-creeping, the scales dense, linear, 

 bright reddish-brown ; st. 3-4 in. 1., firm, densely clothed with similar but 

 narrower squarrose scales ; barren Jr. 4^6 in. 1., f-j in. br., narrowed gradually 

 to both ends ; texture coriaceous ; both sides, especially the lower one, densely 

 clothed with long bright-yellow hair-like scales, which are scarcely at all 

 flattened or ciliated ; veins hidden ; fertile fr. shorter and blunter than the other, 

 the stem longer. A. Mannianum, Mett, 



Hab. Cameroon Mountains and Clarence Peak, Fernando Po, G. Mann. — Thisagrtei 

 with the next in size and habit, but the scales are quite different. 



63. A. lepidotum, Willd. ; rhizome thick, woody, the scales very dense, linear, 

 glossy, black ; st. 1-3 in. 1., firm, scaly throughout ; barren fr. 3-6 in. 1., 

 f-f in. br., the point usually blunt, the base cuneate or rather rounded ; texture 

 coriaceous ; scales furfuraceous and white on the upper surface, large, dense, 

 ovate, ciliated, and ferruginous on the lower one, those on the midrib with a 

 black middle ; veins hidden ; fertile fr. similar to the other, but the stem longer. 

 —Bi. Sp. 5. p. 238. 



Hab. Andes, from Columbia to Peru. — To this appear to belong A. Engelii, Karsten, 

 A. Do/nibeyanum, "F&e, the West Indian A. vcstitum, Schlecht., and Mexican A. fulimm, 

 M. & G-., and probably A. ra/escems, Liebm. It may be a dwarf mountain variety of 

 A, muscosum. 



64. A. strictum, Raddi ; rhizome woody, short-creeping, densely clothed with 

 small lanceolate dark chesnut-brown conspicuously ciliated scales ; St. 1-2 in. 1., 

 clothed with similar scales ; barren fr. 4-6 in. 1., ^f in. br., narrowed to both 

 ends ; texture subcoriaceous ; veins mostly simple ; upper surface nearly or quite 

 naked when old, lower densely clothed with bright reddish-brown scales, which 

 are almost reduced to stellate tufts of hairs ; fertile fr. about equal to the other, 

 but the stem longer. — Hk. Sp. 5. p. 225. A. viscidum and angustum. Fie, 



Hab. Brazil and Columbia. — ^This bears the same relation to awicomwn, that lepidotum 

 does to muscosvm. 



55. A. viUosum, Sw. ; rhizome woody, but not thick, densely clothed with 

 bright-brown soft fibriUose scales ; st. tufted, 2-4 in. 1., slender, densely clothed 

 with spreading scales like -those of the base.; barren fr. 6-9 in. L, 1-1^ in. br., the 

 point acute, the lower part narrowed gradually ; texture thin and flaccid ; both 

 sides with scattered scales like those of the stem, and the edge usually densely 

 ciliated ; veins distant, usually once forked, clubbed at the point and not 

 reaching the edge ; fertile fr. much smaller than the other. — Hk. Sp. 5. p. 225. 

 Hk. 4- Gr. t. 95. 



Hab. Mexico and Cuba to Pern. — A. s^imctum, Kubn, gathered by Barter at Sierra 

 Leone, is more robust and more scaly. A. wndulatum, Willd., Hk. Sp. 5. p. 212, is 

 evidently a form. It is larger and thinner than the type, with main veins two lines 

 apart. A. seiosum, Liebm., is a small form, less scaly than usual, and A. Plv/mieri, Fde, 

 Hk. Sp. 5. p. 226, a thin variety, with the edge of the frond repand. This may be known 

 from all its neighbours, except cirmamomeum, by the scales, ^however dense, being 

 uniform, and not at all flattened. 



3f 



