FERNS OF THE MALAY-ASIATIC REGION. 59 



on a side, forked at the base; sori costular; indusium scale-like, minute. 

 Hemitelia manilensis Presl is described as a species resembling this, 

 found in Luzon. 

 Java, Sumatra. 



95. Cyathea mertensiana (Kze.) Copel. (Alsophila mertensiana Kze. in Bot. 

 Zeit. 6 (1848) 586). 



Bachis glabrescent, verrucous with shining, brown warts; pinnae long- 

 stalked; pinnules approximate, short-stalked, oblong-lanceolate, acumi- 

 nate, deeply pinnatifid, costas glabrous above, at base beneath bearing 

 sparse, white, bullate scales; segments falcate, rather obtuse, margin 

 reflexed and obscurely serrulate, the fertile segments contracted and the 

 lowest free but adnate; veinlets forked, usually twice, white-hairy; sori 

 minute, crowded, occupying the entire segments; indusium a cup-shaped 

 basal scale. 



Bonin. 



96. Cyathea ornata (Scott) Copel. (Alsophila ornata Scott in Bedd. Ferns 

 Brit, Ind. (1870) 342). 



Frond ample, tripinnate, moderately firm in texture; rachises castane- 

 ous, smooth, naked beneath; pinnoe stalked, oblong-lanceolate, 45 to 60 

 cm long; pinnules sessile, lanceolate, 8 to 10 cm long, 18 to 24 mm wide, 

 costse scaly, especially beneath; segments close, ligulate, obtuse, denticu- 

 late, 2 mm wide, green on both sides, without scales or hairs; veinlets 8 

 to 12 on a side, forked; sori minute, subcostular, exindusiate. Alsophila 

 Oldhami Bedd. is usually regarded as this species; but as figured by 

 Beddome it differs in having long-stalked pinnae and the costules scaly 

 beneath. 



Sikkim, alt. 750 m. 



97. Cyathea dementis Copel. {Alsophila dementis Copel. in Philip. Journ. 

 Sci. 1 Suppl. (1906) 143). 



Trunk 9 m high, stout ; stipe brown at the base, shading to stramineous 

 in the rachis, clothed at the base with linear, whitish scales 5 to 15 mm 

 long, exceedingly rough with blackish, stout, sharp spines 4 to 5 mm 

 long; rachis glabrous, beset with smaller spines; frond 100 to 150 cm long, 

 ovate; middle pinnae 30 to 40 cm long, their rachises rough; pinnules 6 

 to 8 cm long, 15 mm wide cut at the base to the costa, elsewhere to a 

 narrow wing, costse above bearing dirty-white hairs or nearly naked, 

 beneath naked or sparsely f urfuraceous-squamulose ; segments subfalcate, 

 entire, obtuse, coriaceous, glabrous, greenish-brown above, paler beneath 

 but not glaucous; veinlets forked, about 10 on a side; sori infra-medial, 

 naked, receptacles evidently paraphysate. 



Mindanao (Lanao). 



