52. GYMNOGRAMME, CEROPTERIS. 385 



only the lowest toothed ; powder bright-yellow. y, G. ornithopteris, Klotzsch ; 

 texture more coriaceous, edges of the divisions incurved ; powder white or yellow. 



Hk.> Sp. 5. p. 148. S, G. Steltzneri, Koch ; fr. elongated, flaccid ; pinnce 



lanceolate, subdistant ; powder yellow, thin ; st. and rachis pubescent. G. Bou- 

 cheana, Mett. 



Hab. Tropical America. There is no clear line of distinction between this and the 

 preceding. The forms associated here differ mainly from those placed under calomelanos 

 by being firmer in texture and less divided. G. guianensis, Klotzsch, comes between 

 a and y, and 0. adiantoides, Karst., is said to differ from ft by its sublanceolate outline 

 and acuminate pinnules. We cannot distinguish from G. ochracea a plant gathered by 

 Gerrard in Natal. 



54. G. (Cerop.) calomelanos, Kaulf. ; st. tufted, firm, 6-12 in. 1., nearly black ; 

 f r. 1-3 ft. 1., 6-12 in. br., oblong-deltoid, tripinnatifid ; pinnce close, lanceolate, 

 the lowest the largest, sometimes 6 in. 1., 1^-2 in. br. ; lower pinnl. distinct, 

 lanceolate or subdeltoid, often cut down nearly to the rachis ; texture, sub- 

 coriaceous or herbaceous ; powder white. Hk. G. F. t. 30. /3, G. peruviana, 

 Desv. ; fr. smaller ; st. and rachis castaneous ; lower pinnce deltoid ; lower 

 pinnl. often cut down to the rachis. y, G. chrysophylla, Kaulf. ; size and habit 

 of (3, but the rachis darker and the powder bright yellow. Hk. Sp. 5. p. 148. 



Hab. West Indies, southward to Eio Janeiro, Peru, and Samoa ; Tropical West 

 African Islands. We include here a wide range of forms connected by very gradual 

 intermediate stages. G. L'Herminieri, Martensii, and Massoni of Link, and C. inter- 

 media, Fe"e, are all intermediate between a and y. The Polynesian plant is G. Brackcn- 

 ridyei of Carruthers. 



55. G. (Cerop.) pukhella, Linden ; st. tufted, firm, 6-9 in. 1., dark chesnut- 

 brown, powdery ; fr. 6-12 in. 1., 4-6 in. br., oblong-deltoid, tripinnatifid ; lower 

 pinnce the largest, lanceolate-deltoid ; pinnl. imbricated, the lower ones sub- 

 deltoid ; segm. flabellato-cuneate, often A in. br. ; texture herbaceous ; powder 

 pure white. Hk. Fil. Ex. t. 74, 



Hab. Venezuela. Joined in " Sp. Fil." to G. sulpliwrea, from which it differs by its 

 more robust habit, white powder, and frond broadest at the base. It comes very near 

 G. peruviana. Var. Wettenhalliana, Moore, is a garden variety, with pale sulphur- 

 coloured powder. 



56. G. (Cerop.) sulphurea, Desv. ; st. densely tufted, 1-6 in. 1., generally 

 short, slender, chesnut-brown, often powdery ; fr. 6-12 in. 1., 3-4 in. br., ovate- 

 lanceolate, tripinnatifid ; pinnce lanceolate, the lower ones gradually reduced ; 

 pinnl. flabellately cut, with entire or cleft cuneate segm. l-l lin. br. ; texture 

 herbaceous ; powder bright yellow. Hk. Sp. 5. p. 147. 



Hab. West Indies. Distinguished by its cutting, small size, herbaceous texture and 

 frond narrowed in the lower third. 



57. G. (Cerop.) argentea, Mett. ; st. tufted, slender, 3-6 in. 1., chesnut-brown, 

 glossy ; fr. 6-12 in. 1., subdeltoid, quadripinnatifid ; pinnce not numerous, often 

 distant, deltoid, the lower ones 3-4 in. 1., 2 in. br. ; pinnl. and segm. deltoid, 

 the ult. divisions small, flabeilato-cuneate ; texture herbaceous ; powder white 

 or tinged with red ; sori pale-brown. G. conspersa, Kze. Hk. Sp. 5. p. 147. 

 G. farinosa, Bojer. G. rosea and Thiebautii, Desv. 



Hab. Mascaren Isles and Natal. G. conspersa, Kze., appears to be a slender flaccid 

 form of the Mascaren specie*!. G. aurea, Desv. (A crostichum, Bory), is a variety with 

 yellow powder found in Madagascar, Bourbon, and Angola. 



