60. ACROSTICHUM. 405 



29. A. squarrosum, Klotzsch ; rhizome wide- creeping, the scales dense, linear, 

 dark chesnut-brown ; st. ^-1^ in. L, slender, slightly scaly ; barren fr. 2-3 in. 1., 

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

 with scattered linear dark-chesnut scales ; veins visible ; fertile fr. \ in. L, \ in. 

 br., the stem 2 in. \.Hk. Sp. 5. p. 224. 



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

 frond a different shape. 



30. A. Lloense, Hk. ; rhizome slender, wide-creeping, the scales adpressed, 

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

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

 narrowed suddenly or rather rounded ; texture subcoriaceous ; under surface 

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

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

 p. 229. Ic. t. 657. 



Hab. Mexico, along the Andes to Peru. 



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

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

 scaly ; barren fr. l|-2 in. 1., f-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. 5. p. 224. 



Hab. Columbia and Ecuador. 



32. A. Huacsaro, Rinz. ; 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, |-f 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 ligulate fronds 

 and very coriaceous texture. 



B. Barren fronds 6-18 inches long. Sp. 33-45. 



33. A. Gardnerianum, Fee ; caud. woody, erect, the scales large, ovate-lan- 

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

 similar spreading scales ; barren fr. 4-6 in. L, f-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 conforme, but the scales 

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



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

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

 slightly scaly ; barren fr. 6 in. L, 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. L, in. br., the 

 st. 1 ft. L Sert. PL t. 25. A. exirnium, 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. 



