462 riLiCES. [Bavallia. 



scaly and woolly. Fronds 2 ft. high or more, very broad, glabrous, firm, 

 smooth and shining, 3 or 4 times pinnate. Pinnae and pinnules all acuminate, 

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

 base, but only slightly decmTent on the rhachis, the larger ones sen-ate. Veins 

 few, diverging fi'om a raised midrib. Sori usually oblong, partially sunk in 

 the under siu-face of the lobes or smaller segments, with a naiTOW cup-shaped 

 indusium. 



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

 Australia, and the Pacific islands. The Hongkong specimens belong to Hooker's var. S 

 co7iiifolia. 



5. D. Griffithiana, Hook. Spec. FiL i. 168. Habit of B. elegans, but 

 not so large. Fronds usually twdce or thrice pinnate, \^ to 2 ft. high, the 

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

 base. Sori 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 Chusan. 



6. D. tenuifolia, Siv.; Hook. Spec. i^/Z. i. 186. Ehizome thick, shortly 

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

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

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

 cuneate in the typical fonn, 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 and denticulate. — D. chinensis, Sw. ; 

 Hook. I.e. 187. 



Abundant 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 re])resenting B. chinensis, 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. Recep- 

 tacle filiform, often bristle-like, protruding from the indusium, with the spore- 

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

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

 densely matted rhizome. 



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

 extending northward into western Europe. 



Fronds fan-shaped, 3 to 6 lines diameter \. T. parvulum. 



Fronds pinnatifid, | to 1 in. long 2. T. intramarginale. 



1. T. parvulum, 'Pair.; Hook. Spec. Fil. i. 118, t. 39 ^. Ehizome 

 slender, tomentose, and densely matted. Fronds orbicular-fan-shaped, 3 to 6 

 lines diameter, on a filifonn 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 or lobes, which are usually shorter than the 

 barren ones. 



I 



