462 FILICES. 



scaly and woolly. Fronds 3 ft. high or more, very broad, glabrous, firm, 

 smooth and shining, 3 or 4 times pinnate. Pinnse and pinnules aU acuminate, 

 passing into a pinnatifid apex. Segments lanceolate or oblong, acute at the 

 base, but only sHghtly decurrent on the rhachis, the larger ones serrate. Veins 

 few, diverging from a raised midrib. Sori usuaHy oblong, paitiaUy sunk in 

 the under surface of the lobes or smaller segments, with a. narrow cup-shaped 

 indusium. 



Hongkong, Champion. In Madagascar, Ceylon, the Indian Peninsula, the ArcMpelago, 

 AustraUa, and the Pacific islands. The Hongkong specimens belong to Hooker s var. 5 



5. D. Griffithiana, Eook. S^ec. Ml. i.lGS. Habit of D. eUgans, but 

 not so large. Fronds usually twice or thiice pinnate, li to 2 ft. high, the 

 segments shorter and broader than in B. elegarm, and more confluent at the 

 base. Soil shorter, and inserted on the under side at a considerable distance 

 from the margin or apex of the lobes. 



Hongkong, Wright. In Khasia, Assam, S. China, and northward to Chnsan. 



6. D. tenuifoUa, &w.; Hook. Spec. Fil.i. 186. Khizome thick, shortly 

 creeping, covered with thick brown scales. Fronds 1 to 2 ft. high, glabrous, 

 firm, smooth, and often shining, twice to four times pinnate, the primary 

 pinnae more or less acuminate. Ultimate segments or lobes small, lineai- 

 cuneate in the' typical form, but in other varieties passing to broadly cuneate 

 or obovate, the fertile ones terminating in 1 or 2 short broad sori, the edge of 

 the indusium usually on a level with the margin of the lobe. In the barren 

 fronds the segments are usually broader apd denticulate. — B. chinensis, Sw. ; 

 Hook. I.e. 187. 



AbuVidant in the island. Hinds, Champion, and others. Generally distributed over India, 

 the Archipelago, and Pacific isles, and northward to S. China and Bonin. The majority of 

 the Hongkong specimens are intermediate between the narrow-lobed Indian varieties, and 

 the broad-lobed small forms considered as representing D. chinfnsis, of which a very well- 

 marked specimen is among Hinds's, from Hongkong. 



24. TRICHOMANES, Sm. 



Sori inserted at the end of a vein, and contained in a tubular indusium at 

 or near the margin of the frond, and usually projecting beyond it. Eecep- 

 taole filiform, often bristle-Kke, protruding from the indusium, with the spore- 

 cases at its base within the indusium. — Herbaceous Ferns, often very small, 

 the half-peUueid fronds variously divided, and inserted on a creeping often 

 densely matted rb'zome. 



A large genus, chiefly tropical, common to the New and the Old World, vrith 1 species 

 extending northward into western Europe. 



iVonds fan-shaped, 3 to 6 lines diameter 1. 7. 



Fronds pinnatifid, i to 1 in. long %, T. Xntramarginale. 



1. T. parvulum, Toir.-, HooTc, Spec. Ml. i. 118, t. 39 A. Ehizome 

 slender, tomentose, and densely matted. Fronds orbicular-fan-shaped, 8 to 6 

 lines diameter, on a filiform stipes about as long, deeply and unequally divided 

 into linear-obtuse or obtusely toothed lobes or segments. Sori rare, sunk as 

 it were into the ends of teeth oy lobes, which are usually shorter than the 

 barren ones. 



