108 



POLYPODINEiE. 



B. Receptacles effuse, occupying a crowded mass of reticulated veinlets, forming large amorphous portions or separate lobes of 



the fronds or sometimes definite in form . PLATYCERIEiE. 



PLATT CERIUM, (Desvaux, Ann, Soc. Lin. Par. vi. 213.; 

 (Neuroplatyceros. PluJcenet Fee. ;— Alcicornium, Gaudichaud ;— Scutigera, Fee. ;— Platyceria, Fee ;— Acrostichi Sp:, And.) 



Sori superficial, non-indusiate ; the receptacles, (a series of crowded anastomosing veins), occupying the under-surface of separate 

 lobes or large amorphous portions of the fertile fronds. Veins furcate, free, or here and there anastomosing 3 venules anastomosing in 

 large trapezoid or sub-hexagonal elongated areoles ; the veinlets free, divaricate or hamate within the areoles. 



Fronds heteromorphous, coriaceous, laciniate or lobate, clotbed with stellate hairs ; the fertile ones articulate. Rhizome sub- 

 globose, A very distinct group. The primary veins rarely unite, while the secondary ones are compoundly anastomozed. — (Moore.) 



PlATYCERIUM "WaLLIOHII, (Hook). Fronds ample, bifarious, at length glabrous; sterile ones imbricated below, irregu- 

 larly sinuato -lobate above elongated, dilated deeply and much dichotomously pinnatifid. Segments patenti-inflexed ; fertile fronds 

 geminate very broadly flabellato-cuneate twice — dichotomous suddenly narrowed at the base, each primary division or segment bears a 

 sorus on the disk (hence there are two sori on each frond), which is semi-circular and very much produced in the sinus itself, the terminal 

 segments beyond the soriferous disk are several times dichotomous and pendent, primary veins dichotomous, parallel elevated here and there, 

 anastomosing into broad elongated areoles which are occupied by lesser ones with numerous free-branched included veinlets. — Hook. Sp, 

 Fit. v. 28i.—Hoo7c. inGard. Ghron. for Oct. 1858, p. 765, and in Fil, Exot. t. 97.— Acrostichum alcicorne, Wall Gat n. 19. (not Linn.) 



The specimen figured is from Moulmein — (Parish). 



Hab. Moulmein, banks of Irawaddy, and river Martaban, Malay, Peninsula, 



PLATE No, CVIII. 



