30. PELLJ3A, PLATYLOMA. 151 



down over the sori. Pteris, Cav. Swartz. Cheil., Mett. P. hirsuta, Hk. Sp. 2. 

 p. 153. 



Hab. Chili and Mexico. 



31. P. (Allo.) marginata, Baker ; st. tufted, 3-9 in. 1., strong, erect, polished, 

 chesnut-brown, naked, slightly fibrillose towards the base ; fr. 4-8 in. 1., 3-6 in. 

 br., subdeltoid, tri- or quadripinnatifid ; lower pinnae usually much the largest ; 

 pinnl. on the lower larger than those of the upper side, the latter 1-2 in. 1., 

 lanceolate-deltoid ; ult. divisions linear-oblong with revolute edges, l-2 lin. 1., 

 ^ lin. br. ; texture subcoriaceous ; rachises and both surfaces naked ; sori confluent. 

 Cheilanthes, Hk. Sp. 2. p. 105. j3, C. pyramidalis, Fee, 8. Mem. t. 25 ; fr. lan- 

 ceolate ; pinnae secund, with long (sometimes J in.) pendent slightly compound 

 pinnules. 



Hab. Tropical America, from Mexico and Jamaica southward to Peru and the Argen- 

 tine territory. The finest examples in the Hookerian Herbarium are from Salvin and 

 Godman's Guatemalan collections, with the lowest pinnules more than 2 in. 1., 1^ in. br. ; 

 but usually it is much smaller. C. pyramidalis looks very different to the ordinary form, 

 but appears connected with it by intermediate stages. 



32. P. (Allo.) Barklyce, Baker ; st. 12-18 in. 1., strong, erect, naked, dark- 

 brown, polished ; fr. 1 ft. or more 1., 9 in. br., deltoid, quadripinnatifid ; lowest 

 pinnae 6-8 in. 1., subdeltoid ; pinnl. on the lowest side the largest, with numerous 

 segm. on each side, which are cut down to the rachis into numerous linear ult. 

 divisions, 3 lin. 1., 1 lin. br. ; texture coriaceous ; rachis and both surfaces 

 naked ; sori running along the opposite edges of the gradually narrowing 

 segments, so that the broad pale-brown membranous invol. usually touch near 

 the top. Cheil. Barklyj-e, Hk. MSS. 



H a b. Seychelles ; sent by Lady Barkly and Dr. Kirk. This comes nearest to the 

 broad-leaved form of P. angustifolia, but is much larger in size. 



Platyloma, J. Smith. Texture coriaceous, the veins usually hidden, the 

 ultimate segments broad and flat, the involucre so narrow that it is soon hidden by the 

 fruit. Sp. 33-40. 



33. P. (Platy.) Bridgesii, Hk. ; st. 2-4 in. 1., wiry, erect, naked, bright 

 chesnut-brown, polished ; fr. 4-C in. 1., 1 in. or less br., linear, simply pinnate ; 

 pinnae 6 to 8 on each side, sessile, oblong, entire, obtuse, rounded or cordate at the 

 base ; texture coriaceous ; rachis naked and polished like the stipe, both surfaces 

 naked, glaucous-green ; veins hidden ; sori in a broad marginal line with the 

 much-wrinkled membranous edge of the frond protruding beyond it till full 

 maturity. Hk. Sp. 2. p. 238. t. 142. B. 



Hab. California. 



34. P. (Platy.) rotundifolia, Hk. ; rhizome stout, creeping, scaly ; st. 6-12 in. 

 1., stout, erect, more or less pubescent and clothed throughout with linear chaffy 

 scales ; fr. 6-12 in. 1., 1-1^ in. br., linear, simply pinnate ; pinnae 10 to 20 on 

 each side, short-stalked, oblong or roundish, entire, obtuse or mucronate at the 

 point ; texture coriaceous ; rachis densely scaly and tomentose, both surfaces 

 naked ; veins beneath hidden ; sori in a broad marginal line soon hiding the 

 involucre. Hk. Sp. 2. p. 136. Fil. Ex. t. 48. 



Hab. New Zealand and Norfolk Island. 



35. P. (Platy.) falcata, Fee ; rhizome wide-creeping ; st. 3-6 in, 1., strong, 

 erect, more or less pubescent and scaly ; fr. 6-18 in. L, 1-2 in. br., linear-oblong, 

 simply pinnate ; pinnae 10 to 20 on each side, nearly sessile, -1 in. 1., j-^ in. br., 

 lanceolate or lanceolate-oblong, usually mucronate, often slightly falcate, 



