GO. ACROSTICIIUM. 405 



29. A. squan'osiiin, Klotzscli ; rhkome wide-creeping, tlic scales dense, linear, 

 (lark chcsnut-brown ; s(. J^-H in. 1., slender, slightly scaly ; barren fr. 2-3 in. 1., 

 ^ in. br., narrowed gradually to both ends ; texture herbaceous, the under surface 

 \vith scattered linear dark-chesnut scales ; veins visible ; fertile fr. \ in. 1., ^ in. 

 br., the stem 2 in. l.—IIL Sp. 5. p. 224. 



Hab. Columbia, Movilz, 319. — Most like the last, but the scales different, and the 

 frond a different shape. 



80. A. License, Ilk. ; rhizome slender, wide-creeping, the scales adpresseil, 

 lanceolate-acuminate, ferruginous ; st, 1-2 in. apart, 2-5 in. 1., slender, slightly 

 scaly; barren fr. 2-4 in. 1., \-\\ in. br., the point blunt or acute, the base 

 narrowed suddenly or rather rounded ; texture subcoriaceous ; under surface 

 with a few small linear dark chcsnut-brown scales ; veins visible, not reaching 

 the edge ; fertile fr. much smaller than the other, on a longer stem. — Ilk. >Sp. 5. 

 p. 229. /c. t. 657. 



Hab. Mexico, along the Andes to Peru. 



31. A. Tieteromorphum, Klotzsch ; rhizome filiform, wide-creeping, the scales 

 small, scattered, lanceolate-acuminate, brown ; st. 1-3 in. 1., slender, slightly 

 scaly ; barren fr. \\-1 in. 1., |-1 in. br., the point bluntish, the base rounded ; 

 texture thin but firm ; both sides scattered over with linear dark castaneous 

 scales ; veins conspicuous, raised and darker in colour than the rest of the frond ; 

 fertile fr. much smaller and the st. much longer. — Hk. Sp. h. p. 224. 



Hab. Columbia and Ecuador. 



82. A. Huacsaro, Ruiz ; rhizome woody, wide-creeping, the scales short, 

 black, fibrillose ; st. of barren frond 1 in. 1., clothed with small furfuraceous 

 scales ; barren fr. 3-4 in. L, ^-§ in. br., the point very blunt, the lower part 

 narrowed very gradually ; texture coriaceous ; the lower surface viscid, the upper 

 with scattered minute furfuraceous scales ; veins fine, close, indistinct; fertile fr. 

 narrower than the other and the st. much longer. — A. Calaguala, Klotzsch. Hk. 

 Sp. 5. p. 218. A. Ruizianum, Moore. 



Hab. Columbia to Peru. — Distinguished from all the preceding by its ligulatc fronds 

 and very coriaceous texture. 



B. Barren fronds G-18 inches long. Sp. 33-45. 



83. A. Gardncrianum, Fee ; caicd. woodj^, erect, the scales large, ovate-lan- 

 ceolate, pale-brown ; st. tufted, 1-2 in. 1., firm, erect, densely clothed with 

 similar spreading scales; barren fr. 4-6 in. 1., |-1 in. br., the point blunt, the 

 base rather rounded ; texture coriaceous ; upper surface nearly naked, lower 

 with small thickly scattered furfuraceous scales ; veins raised beneath, fine, 

 usually once forked ; fertile fr. narrower than the other, narrowed at the base 

 on a stem 6-8 in. 1. Hk. Sp. 5. p. 233. 



Hab. Brazil and Venezuela. — Texture and general habit of confornic, but the scales 

 almost dense enough to entitle it to a place in the next group. 



84. A. alpestre, Gardn. ; rhizome wide-creeping, densely clothed with lan- 

 ceolate acuminate bright-chesnut scales ; st. of barren frond 4-5 in. 1., erect, 

 slightly scaly ; barren fr. 6 in. 1., f in. br., bluntish at both ends ; texture sub- 

 coriaceous ; surface rather thickly scattered over with small linear bright- 

 chesnut scales ; veins distant, prominent ; barren fr. 2-3 in. 1., \ in. br., the 

 St. 1 ft. \.—Sert. PL t. 25. A. eximium, Mett. 



Hab. Organ Mountains, Brazil, Gardner, 5924 ; N. Granada, Lindig, 318. — Differs 

 from the next principally by its shorter fertile frond rounded at the base. 



