124 21. ADIANTUM, § EDADIANTUM. 



from A. Capillm -Veneris, but is pmnately branched very regularly and copiously, and 

 even when the pinnae are famished with long pinnules, there is an almost sessile single 

 segment at the base adpressed to the main rachis. 



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

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

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

 IJ 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. Ohron. 1865. 



H.ib. Ecuador and Peru. — This has much of the regularly-pinnate habit of A. concin- 

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

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

 truncato-dimidiate type of form. 



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

 br., deltoid, tri- or quadripinnate ; segm. -^j 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 ; tesettire very thin ; rachis 

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

 versely oblong patches in the lobes of upper half. — Hk. Sp. 2. p. 46. 



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

 Resembling A. Gapillus- 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 . mne atum^l^jies. & Fisch. ; st. 6-9 in; 1., slender, erect, blackish, naked, 

 polishe3V'y^."S'-Ta in. i., 6-9 in. br., deltoid, tri- or quadripinnate ; lower pinnce 

 4-6 in. 1., 2-3 in. br. ; seffm. numerous, J-f in. br., cuneate at the base, the upper 

 edge deeply lobed ; textvre thin ; racMs naked ; sari 4 to 6, obversely reniform, 

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

 Hk. & Gr. t. 30. 



Hab. Brazil. — This also comes near wthiopicum, but is a larger and more branched 

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

 in the lower half. 



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

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

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

 irregularly rounded, more or less lobed ; Jaz^are 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. A. mexicanum, Presl. A.andicolum andamabile, 

 Liebm. 



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 pinnee, the lowest of which are 

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

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

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



