] FILICES. 441 



passing into the segments of the simply pinnate summit of the frond. Fertile 

 pinnae below the barren ones with linear segments seldom, above 4 or 5 lines 

 long. 



Hongkong, Borland; Tank Ravine, TJrquhart. Not known out of the island. 



3. O. javanica, Blume ; Hook, in Eew Journ. Bot. ix. 360. Fronds 1 

 to 3 ft. high or more, glabrous, simply pinnate. Barren segments linear or 

 Uuear-lanceolate, 3 to 6 in. long, entire or more or less deeply serrate. Fer- 

 tile pinnse occupying the centre, or rarely the base or summit of the frond, 

 eacb pinna pinnatifid or almost pinnate, witb numerous globular or oblong 

 segments (or clusters of spore-cases). — 0: Vachellii, Hook. Ic. PI. t. 15. 



In ravines, Hinds, Champion, and others. Widely spread over India and the Archipelago, 

 extending northwards to Mautchuria and Japan. 



8. lygodiitm:, Sw. 



Sori oblong or linear, covering the imder side of small lobes which either 

 protrude from the margin of tbe frond-segments or form distinct parts of the 

 frond, each sorus divided into 3 rows of compartments containing each a 

 single spore-case and covered by a bract-like indusium. Spore-cases trans- 

 versely oblong, opening by a longitudinal sUt, the upper end turned downwards 

 and marked with longitudinal striae. — Climbing Ferns. Fronds pinnately or 

 dicbotomously divided, inserted on the main stem or branches, in divaricate 

 pairs, usually on a very short common petiole. 



A small tropical and subtropical genus, common to the New and the Old World, one spe- 

 cies extending into temperate N. America. 



Fronds in each pair dichotomously divided \. L. circinatum. 



Krouds in each pair pinnately divided. 



Segments articulate on the Chickened end of the petiolule .... 2. i. scandens. 



Segments continuous with and decurrent on the petiolule .... S. L.japonicum. 



1. Li. circinatum, Sw.; Presl, Tent. Pterid.Suppl. 100. Stems climb- 

 ing to a great height, and as well as the fronds perfectly glabrous. Fronds 

 of each pair stipitate, either deeply pedately lobed, or divided into 3 deeply 

 3- or 3-lobed segments ; lobes Knear-oblong, from a few inches to above a 

 foot long, i to 1 in. broad when barren, naiTOwer in the fruiting part, continu- 

 ous with and slightly decurrent on the petiolule. Sori 1 to 3 lines long, pro- 

 jecting from the mai-gin, usually in the lower half of the lobes. — L. dichoto- 

 mum, Sw. ; Presl, 1. c. ; Hook, and Grev. Ic. Fl. t. 55. 



Hongkong, Dill, Wright; in the Happy Valley, Vrguhari; in a ravine of Mount Gough, 

 and plentiful behind the Buddhist Temple, Wilford. In the Malayan Peninsula, the Archi- 

 pelago, and the Philippines. 



3. L. scandens, &w.; Presl, Tent. Pterid. Suppl. 103. Stems rather 

 slender but climbing to a considerable extent, glabrous or slightly pubescent. 

 Pairs of fr-onds usually petiolate. Bach frond pinnate. Segments 5 to 1 or 

 more from cordate-ovate to oblong-lanceolate or hastate, varying in the Hong- 

 kong' specimens from \ to \\ in. long, but much longer in some Indian ones 

 often shortly lobed at the base, and always articulate onasKght thickemng ot 

 the apex of the petiolule, which persists on the common rhachis alter the 

 segments have fallen off. Sori short, protruding from the margin of segments 



