Prats 50. 
GYMNOGRAMME catomenanos, Kaulf. 
Black-stalked Powdery Gymnogramme. 
GyMNnoGRramME calomelanos ; caudex short, suberect, stout, densely rooting at 
the base; stipites tufted, one to two feet long, ebeneous-purple or black, 
as is the rachis; fronds about the same length as the stipes, oblong, acu- 
minate, subcoriaceous, beneath pulverulent with a white (or yellow) cera- 
ceous substance, bi-tripinnate; primary pinnz lanceolate, secondary ones 
oblong-lanceolate, cuneate at the base, and subdecurrent, more or less acute 
or acuminate, inciso-serrate, pinnatifid, or at their base again pinnate; their 
apices sometimes sharply serrated ; lowest superior basal pinnules often sub- 
auriculate; veinlets dichotomous, erecto-patent ; sori oblong, lax, reddish, 
occupying the forked veins. 
GyMNOGRAMME calomelanos. Kaulf. En. Fil. p. 16. Hook. Gen. Fil. t. 16. 
Metten. Fil. Hort. Lips. p.41. J. Sm. Cat. Cult. Ferns, p. 18. 
Acrosticuum calomelanos. Linn. Sp. Pl. p. 1529. Schk. Fil. p. 4.4.5. Sw. 
Syn. Fil. p.15. Willd. Sp. Pl. v. 5. p. 123. Hort. Berol. t. 41. Fisch. 
et Langsd. Fil. t. 3 (very good). 
Crropreris calomelanos. Link, Hort. Berol. v. 2. p.53. Fée, Gen. Fil. p. 183. 
Filix non ramosa major, caule nigro, etc. Sloan. Jam. v.1. t. 80. f. 2. 
Filix albissimo pulvere conspersa. Plum. Fil. v. 30. ¢. 40. 
B. aureo-flava ; frond golden-yellow beneath. G. chrysophylla, Kaulf.{? 
Has. Tropical America, abundant. West India Islands, universal; Cuba, C. 
Wright, n. 298 and 777, n. 1047; vay. elata; some of the pinnules an 
inch and a half long, all obtuse. Dominica, Finlay (some specimens quite 
golden-yellow beneath, others white). Central America, Nicaragua, C. 
Wright; Panama, Fendler ; Galapagos, Capt. Wood; New Granada, Mo- 
ritz, n. 118 (large, pinnules one and a half inch and more long, subentire) ; 
Bogota, Holton, n. 24; Caraccas, Linden, n. 264; British Guiana, Parker, 
Sagot, Appun, n. 170 and 183 (large, pinnules narrow, sharply acuminated). 
Peru, Mathews ; Ecuador, Jameson. Brazil, frequent, Rio Negro, Spruce, 
n. 2969, etc. Tropical Africa, Prince’s Island, Barter in Bazkie’s Second 
Niger Expedition, n. 1912. Fernando Po, Barter, Mann, n. 137, common 
forms.—Var. golden-yellow beneath, Porto Rico, Baron de Schach; Gua- 
temala, Skinner. Hot valleys of Ecuador, Seemann, n. 948 ; Guadeloupe, 
DP’ Herminier ; “G. chrysophylla, Willd.,” and again “ G. Martensii, Bory” 
(from the Herb. Mus. Paris); Brazil, Gardner, n. 12 (rather sulphur than 
golden-yellow).—Cultivated in Kew and elsewhere; and in the collection 
of the Oxford Botanic Garden, occasionally producing pinne, of which 
some of the pinnules are pure white on the under side, while others are rich 
golden-yellow, as represented in our Plate, fig. 3. 
One of the most common Ferns of tropical America, and 
scarcely known beyond that extensive region; but the more the 
JANUARY Ist, 1862. 
