780 CXLVII. FILIOES. [ derostichum. 
Widely spread over the tropical and subtropical regions of the New and the Old 
World. In Australia chiefly in swampy flats or salt water marshes. 
curved over them when young but at e ede the under 
surface. Spore-cases often cure with peltate scales.—Hymeno- 
lepis spicata, Presl; ic. Exot. t. 78, Gard. Ferns, t. 3; 
Bedd. F 
Queensland. Brisbane River, Moreton Bay, W. Hill. 
Spread over tropical Asia, extending to the Mascarene and to the Pacific 
Islands, 
7. A. pteroides, R. Br. Prod. 145.—Rhizome shortly creeping. 
Fertile fronds ovate-lanceolate in ie emma a 3 to 6 in. Xe on à 
g 
Barren fronds, which I have not seen, “smaller than the fertile 
H Spec. Filic. Muell. ragm. v. 139; AVeurosoria 
ee A xor in Bot. Zeit. 1869, 438. 
ustralia, North Coast, R. Brown; Port Darwin, Schultz, n. 137 ; Gilbert 
[ced rv 
Queensland. Endeavour River, G. Brown. 
38. PLATYCERIUM, Desv. 
Rhizome x and thick. Fronds large, the outer ones of each year's 
wth bar and horizontally spreading, the fertile ones erect 
cuneate forked or dichotomous, the veins prominent radiating and 
A small genus, sparingly distributed over the Malayan Arcaia Me and tropical 
Africa and America. Neither of the Australian species are endemi 
Sori qut the ultimate poe of the fertile fronds 1. P. aleicorne. 
Sori forming a h under the ow: sinus of the 
comer division o the fertile fronds . 2. P. grande. 
P. alcicorne, Desv. ; Hook. Spec. Filic. v. 282, Syn. Filic. "^ i 
Bien fronds Nar A DEPA era cottony when young, 6 in ft. 
