3GO 4b. POLYPODIUM, PHYMATODES. 



main veins very distinct, tne areolse hidden ; upper surface with close small 

 dirty-white dots ; sori much immersed, in single rows between the main veins, 

 8-9 between the midrib and edge. P. crassinervium, Blume. Hk. Sp. 5. p. 63. 



Hab. Java. 



338. P. (Phym.) crassifolium, L. ; rhizome woody, short-creeping, the scales 

 ovate-acuminate, dull-brown ; st. 2-6 in. L, strong, erect ; fr. 1-3 ft. 1., 1-5 in. 

 br., narrowed gradually to both ends, the edge entire ; texture very coriaceous, 

 the upper side with scattered small white dots ; main veins very distinct, the 

 intervening areolse hidden ; sori in single rows between the main veins, 2-9 in a 

 row between the midrib and edge. Hk. Sp. 5. p. 62. 



Hab. West Indies and Mexico to Brazil and Peru, common. Very variable in the 

 breadth of the frond and compactness of the sori. P. anocarpum (Kze.) and P.Vittaria 

 (Mett.) are not more than |-1 in. br., with the sori in 2 to 4 rows ; P. albo-punctatissi- 

 mum, J. Sm., is a glaucous much-dotted form, with less distinctly-raised veins than 

 usual. 



339. P. (Phym.) membranaceum, Don ; rhizome stout, the scales ovate, spread- 

 ing, membranous, lurid-green ; st. 1-4 in. 1., firm, erect ; fr. 1-3 ft. 1., 2-6 in. br., 

 the edge entire or repand, both ends narrowed gradually ; texture very thin, 

 membranous ; main veins distinct, with very copious fine areolse with free 

 veinlets between them ; sori mostly in two rather irregular rows near the main 

 veins. /3, P. grandifolium, Wall. ; fr. larger ; sori more copious and scattered 

 irregularly. Hk. Sp. &.p. 70. 



Hab. N. India (up to 5-6,000 ft.) to Ceylon, common. 



340. P. (Phym.) Jieterocarpum, Blume (non Mett.) ; rhizome firm, wide-creep- 

 ing, the scales squarrose, linear, dull-brown ; st. 3-4 in. 1., firm, erect ; fr. 1-2 

 ft. L, 1J-3 in. br., entire, narrowed to both ends very gradually ; texture firm ; 

 both sides naked ; main veins distinct to the edge ; areolce copious, with free 

 veinlets ; sori in rows of 4 to 6 near the main veins. P. Zollingerianum, Kze. 

 /3, P. Zippellii, Blume ; sori smaller, scattered irregularly. Hk. Sp. 5. p. 72. 



Hab. N. India, Ceylon, Java, Borneo, Philippines. Like the last in habit, but firmer 

 in texture, and the two forms of each corresponding to one another. 



341. P. (Phym.) irioides, Lam.; rhizome stout, the scales dark-brown, ovate, 

 obtuse ; fr. sessile or subsessile, 1-3 ft. 1., 1-3 in. br., narrowed gradually to both 

 ends, the edge entire ; texture subcoriaceous ; both sides naked ; main veins fine, 

 but distinct to the edge, connected by cross veinlets larger than the others, with 

 copious fine areolse in the interspaces, including free veinlets ; sori very small 

 and copious, scattered irregularly. Hk. Sp. 5. p. 67. Fil. Ex. t. 4. Microsorium, 

 Link. Acrostichum punctatum, Linn., oldest name. 



Hab. N". India and Chusan to Fiji, Isle of Pines, and N. S. Wales, Mascaren Isles, 

 Zambesi-land, Natal, Angola, Guinea Coast. 



342. P. (Phym.) muscefolium, Blume ; rhizome woody, the scales ovate, dull- 

 brown \fr. 1-3 ft. L, 3-4 in. br., the point acute or bluntish, the lower part broadly 

 winged to the very base ; texture coriaceous ; both sides naked ; main veins very 

 distinct, connected by distinct arched veinlets, with copious fine areolse with free 

 veinlets in the interspaces ; sori small, very numerous, sometimes covering nearly 

 the whole surface. Hk. Sp. 5. p. 68. 



Hab. Malay Isles. Very near the last, but the veins more distinct. 



343. P. (Phym.) hemionitideum, Wall. ; rhizome woody, hypogeeous ; st. 1-6 

 ii.. L, firm, erect ; fr. 9-18 in. 1., 2-3 in. br., narrowed to both ends, the edge 



