522 ACROSTICHUM. 



in. ]., i-^ in. br., narrowed gradually to both ends, with a stramineous minutely- 

 furfuraceous 5^. nearly as long as itself ; texture thin but firm ; upper surface 

 naked when mature, lower closely dotted with minute ferruginous deeply 

 ciliated peltate scales ; veins fine, close, erecto-patent ; fertile fr, similar but 

 smaller. 



Hab. Angola, Wdwitich, 187. 



40*. A. ferrugineum. Linden ; rhizoine woody, short-creeping ; scales lanceolate, 

 brown, membranous ; barren fr. lanceolate, narrowed gradually to both ends 

 1 ft. 1,, 15-18 lin. br., with a nearly naked stramineous st. 2-.3 in 1., Avino-ed at the 

 top ; ?e«^?M'c subcoriaceous ; rems moderately close and distinct, subpatent ; upper 

 surface bright-green, naked, lower scattered over with very minute persistent 

 adpressed peltate scale-dots ; fertile fr. much smaller, with a st. 5-6 in. 1. 



Hab. Andes of Columbia. — Habit exactly of latifoUum. 



41*. A. taUtense, Carruth. ; rhizome short-creeping ; scales linear ; st. 3-4 in. 1. 

 semiterete, scaly at the base only ; barren fr. lanceolate, 12-14 in.'l., 11 in. br.' 

 obtuse, narrowed at the base, with small peltate scales on both surfaces • veins 

 immersed, forked ; fertile fr. smaller. — Elaphoglossum, Brack. Fil. Wilkes 

 p. 75. ' 



Hab. Tahiti. — Habit of A. (jorgoneum. 



43*. A. ornatum, ]\Iett. ; rhizome short-creeping; scales dense, membranous, 

 pale-reddish, ovate-acuminate ; barren fr. lanceolate, 6-7 in. 1., 8-10 lin. br., nar- 

 rowed to both ends, with a 1-2 in. st., densely clothed like midrib beneath with 

 spreading ovate-aristate scales 2-3 lin. 1. ; texture thin but firm ; edge bordered 

 with dense very minute ovate-acuminate ferruginous scales ; veins 1-2-fui-cate, 

 erecto-patent ; under side dotted with very minute brown lacerated scales ; fer- 

 tile fr. much smaller, on a longer st. — Kuhn, Linn. ZQ. p. 44. 



Hab. Andes of Venezuela, Engcl, 201. 



46*. A. Mandoni, Mett. ; rhizome slender, wide-creeping ; scales dark chestnut- 

 brown, entire, subulate from a broad base ; barren fr. \\ in. 1., J-^ in. br., 

 oblong or ovate, cuneate at base, acuminate at apex ; st. distant, g-1 in. ; tex- 

 ture membranous ; both sides brown-glandular, and clothed with membranous 

 reddish ovate-acuminate scales ; veins translucent, erecto-patent ; fertile fr, 

 smaller, on a much longer st. — Kuhn, Linn. 3G. p. 47. 



Hab. Andes of Bolivia, Mandon, 12. 



48*. A. rujidulum, Willd. ; barren fr. lanceolate, 4-5 in. 1., under ^ in. br., 

 narrowed gradually to both ends; its st. 8 in. 1., with a few castaneous scales 

 at base, and pale-reddish above ; texture subcoriaceous ; veins immersed, ^ lin. 

 apart, erecto-patent ; sccdes lanceolate, reddish, membranous, fimbriated, dense 

 below ; fertile fr. unknown. — Kuhn, Fil. Afr. p. 47. 



Hab. Madagascar, Hefti. WiUdenow. — Differs from its allies by its very oblique veins. 



50*. A. Midleri, Fourn. ; rhizome short-creeping ; sccdes dense, ferruginous, 

 lanceolate, ciliated ; st. tufted, barren, 1-2 in. ; //'. lanceolate .oblong, acute, 2-4 

 in. 1.; surfaces densely clothed with reddish stellate scales ; fertile fr. larger, 

 blunt, longer stalked.— iP?'/. Mex.p. 68. t. I. fig. 2. 



Hab. Orizaba, Mexico, F. Midler. 



40*. A. acrocarpum. Mart.; caud. erect; barren fr. erect, ligulate, 4-6 in. I., 

 6-8 lin. br., narrowed gradually to point, and a st, 1 in. 1., clothed with linear- 



