182 22. DKYOPTERIS. § 1. LASTBAEA. 



quite to the costa. Segments linear, falcate, confluent at the base, hardly 

 repand, subacute. Surfaces naked, opaque; veins 4 — 5 on each side. Sori 

 solitary on the veins; indusium coriaceous, moderately large, at length deciduous. 

 Kew Guinea. 



(6) D. gymnopoda, C. Chf., Ind. Fil. ; Nephrodium gymnopodum, 

 Bk., Trans. Linn. Soc, Bot., 2'i Series, IV, 252. 



Stipes slender, naked, glossy, reddish-brovra, 10—15 c.M. long. Fronds 

 oblong-lanceolate, 2-pinnate, ± 15 c.M. long. Pinnae + 20-jugate, theloveest 

 largest, deflexed, lanceolate, S'/j — ^'/a ^-^^^ ^^^S' ± ^ '^■^- broad, cut down 

 to the costa. Segments linear-oblong, entire, + 2 m.M. broad. Texture sub- 

 coriaceous; surfaces naked; rachis pubescent; veins distant, simple, ereclo- 

 patent. Sori solitary at the base of the segments, medial; indusium small. 



Borneo. 



* (7) D. crassifolia, O. JTfse, C. Ghr., Ind. Fil.; Aspidium arassi' 

 folium, Bl., Rac, Flor. Btz., I, 169; Laslraea nephrodioides, Bedd., Ferns Br.L, 

 II, tab. GIG; L. crassifolia, Moore, Bedd., Handb. Ind. Ferns, 238; Nephrodium 

 crassifolium, Hk., Hk. Bk., Syn. Fil., 266; — var. Motleyanum ; A. Motley aniim, 

 Christ, Ann. Btz., XX, 105 ; N. Motleyanum, Hk., Hk. Bk., 1. c. ; D. Motleyana, 

 C. Chr., Ind. Fil. 



Rhizome creeping, the scales lanceolate. Stipes approximate, scaly below, 

 hairy above, 30—50 c.M. long. Fronds 50-60 c.M. long, 15 — 50 c.M. broad, 

 deltoid-lanceolate. Pinnae 2— 4 '/a c.M. broad, the fertile commonly narrower 

 than the barren ones and sometimes much contracted, sessile or short-stalked, 

 . the lowest stalked, cut '/a — ^l3''^^Y down to ^he costa into blunt or acute, 

 falcate, entire lobes 5 — 8 m.M. broad, the lowest of which are + reduced 

 in size. Texture subcoriaceous ; racbises and midribs finely or obscurely 

 hairy; veins 10 — 12 on each side of the main ones, the lowest sometimes 

 joining or terminating in the tops of the sinuses. Sori commonly 1 to each 

 vein, the higher ones close to the main veins, the lowest often divaricating. 



War. Mlotleyana: Veins anastomosing in the barren fronds; sori 

 medial. Pinnae less numerous, distant. 



Malaya; Burmah; — var. Motleyana: Borneo. 



* (8) O. echinata, O. Ktae, G. Chr., Ind. Vi\.; Aspidium echinatum, 

 Mett., Ann. Mus. Bot. L. B., I, 250; Nephrodium echinatum, Bk., Hk. Bk., 

 Syn. Fil., 266. 



