124 21. ADIANTUM, EUADIANTUM. 



which seems strikingly different from the normal form in habit, but resembles it closely 

 in other respects. In the shape and size of the pinnules this species is not strikingly 

 different from A. Capillus-Veneris, but is pinnately branched very regularly and copiously, 

 and even when the pinnae are furnished with long pinnules, there is an almost sessile 

 single segment at the base adpressed to the main rachis. 



45. A. colpodes, Moore ; st. 4-6 in. 1. ; slender, glossy, dark chesnut-brown, 

 polished, slightly nbrillose ; fr. 9-12 in. 1., 4-6 in. br., deltoid in general outline, 

 tripinnate ; lower pinnae spreading at right angles from the rachis, 2-3 in. 1., 

 \\ in. br., only slightly branched below ; ultimate segm. about ^ in. 1., J in. br., 

 the lower line often straight for some distance, the upper irregularly rounded, 

 lobed, and toothed, all nearly or quite sessile ; texture pellucido-herbaceous ; 

 rachises and both surfaces naked ; sori placed in distinct teeth of the outer edge, 

 the invol. obversely reniform. Gardn. (Jhron. 1865. 



Hab. Ecuador and Peru. This has much of the regularly-pinnate habit of A. concin- 

 num, with which it also agrees in its nearly sessile segments, which in shape resemble 

 more nearly those of A. JEthiopicum, showing, however, more of a tendency to the 

 truncate-dimidiate type of form. 



46. A. tenerum, Swartz ; st. 1 ft. high, erect, naked, glossy ; fr. 1-3 ft. 1., 9-18 in. 

 br., deltoid, tri- or quadripinnate ; segm. \-\ in. br., cuneate or tending towards 

 rhomboidal-dimidiate in shape, the upper edge rounded or somewhat angular, 

 broadly and often rather deeply lobed, all stalked ; texture very thin ; rachis 

 naked and glossy, surfaces naked ; sori placed in numerous roundish or trans- 

 versely oblong patches in the lobes of upper half. Hk. Sp. 2. p. 45. 



Hab. Mexico and West Indian Islands southward to Juan Fernandez and Peru. 

 Resembling A. Capillus- Veneris, but a larger and more branched plant, the segments 

 smaller, more delicate, and less lobed, easily falling from the apex of the petiole when 

 dry. The ramification is much more straggling and confused than^in A. concinnum, and 

 the lower segments have stalks half as long as themselves. A. Farleyense, Moore, appears 

 to be an abnormal form of this species of garden origin. 



47. A. cuneatum, Langs. & Fisch. ; st. 6-9 in. 1., slender, erect, blackish, naked, 

 polished ; fr. 9-18 in. 1., 6-9 in. br., deltoid, tri- or quadripinnate ; lower pinnae 

 4-6 in. 1., 2-3 in. br. ; segm. numerous, ^-| in.-br., cuneate at the base, the upper 

 edge deeply lobed ; texture thin ; rachis naked ; sori 4 to 6, obversely reniform, 

 placed in distinct hollows in the lobes of the outer edge. Hk. tip. 2. p. 39. 

 Hk. & Gr. t. 30. 



Hab. Brazil. This also comes near ^Ethiopicum, but" is a larger and more branched 

 plant, with numerous pinnae, pinnules, and segments, the latter usually distinctly cuneate 

 in the lower half. 



48. A. glaueophyllum, Hk. ; st. 6-9 in. 1., blackish, glossy, erect, naked ; fr. 

 12-24 in. 1., 9-15 in. br., deltoid, quadripinnate ; lower pinnae 6-9 in. 1., 3-6 in. 

 br,, deltoid, erecto-patent ; segm. f in. br., cuneate at the base, the upper edge 

 irregularly rounded, more or less lobed ; texture papyraceo-herbaceous ; rachises 

 glossy ; veins prominent, under side glaucous ; sori 4 to 6, obversely reniform, 

 placed in distinct hollows in the apex of the lobes of the upper edge. Hk. Sp. 2. 

 p. 40. Cent. 61. 



Hab. Mexico and Guatemala. Very near A. cuneatum. The principal difference is in 

 the more rigid texture and more prominent venation, and this is only known in North, 

 the other in South America. 



49. A. fragile, Swartz ; st. tufted, very short, polished, glabrous, blackish ; 

 fr. 6-12 in. 1., 3-6 in. br., with numerous pinnae, the lowest of which are 



branched again ; segm. articulated at the base, very deciduous, in. br., cuneate 

 in the lower half, the upper edge rounded, broadly lobed ; texture papyraceo- 

 herbaceous ; rachis naked ; sori obversely reniform, 2 to 4, placed in distinct 



