196 22. DRYOPEERIS. § 1. LASTRAEA. 



Stipes to 11 c.M. long, stramineous like the rachis, the base clothed with 

 scattered, cystopteroid, lanceolate, ferrugineous, acuminate scales to 5 m.M. 

 long. Fronds 7 — 10 c.M. long, 6 — 7 c.M. broad, triangular-ovate, acuminate, 

 2-pinnatisect. Pinnae erecto-patent, petiolate, the lowest subopposite, trian- 

 gular-ovate. Secondary segments oblong with a broad base, obtuse, entire or 

 pinnatifid, the apex obscurely crenate. Texture membranaceous, thin; colour 

 bright-green; both surfaces densely pilose; veins free, forked, reaching the 

 sinuses of the crenations. Sori roundish, in 2 rows on the ultimate segments 

 indusium membranaceous, pale-coloured, setose and ciliate; sporangia naked; 

 spores globose or ovate, smooth. 



Timot: 



* (42) D. dissecta, O. Ktse, C. Chr., Ind. Fil.; Aspidium dissec- 

 lum, Christ, Ami. Btz., XV, 136; Lasfraea dissecta, Cmr., Bedd., Handb. Ind. 

 Ferns, 260; L. membranifolia, Bedd., Ferns S.I., tab. CII; Nephrodium disnec- 

 lum, Desv., Hk. Bk., Syn. Fil., 282, p.p. ; ' -N. oonjugalum, T. ^ B., MS. in 

 Hc/b. Bog. 



Rhiaomo oroot. — Stipoo to 50 o.M. long or longer, _L acoly at the bogc 



Fronds deltoid to ovate, 30 — 150 c.M. long, 15 — 90 c.M. broad,,..-pfiinate. 

 © Higher pinnae 15 — 25 c.M. long by S'/j c.M. broad, pinnatifid"^ towards the 



^ costa; lower pinnae pinnate, some of the lower b^sa^-pmnulae stalked, much 



g- elongated, deeply pinnatifid, and similaj>>tDsome of the upper primary 



^ pinnae. Ultimate segments crenulgier^^xture herbaceous; upper surface hairy 



cc with scale-like hairs, mjdel'wie naked or also hairy; veins forked. Sori 



terminal on the^artfinor veinlets, forming a single row on each side near the 

 margin;,jntlusium reniform, naked. — Fertile portions of the fronds not rarel) 



re or less ctintracted • 



Malaya; Polynesia, Trop. Australia, l\orlh. India, Madagascar. 



(43) D. papuana, C. Chr., Ind. Fil.; Nephrodium dissitifoUum, Bk. 

 Kew Bull., 1899, 120. 



Stipes naked, glossy, pale-brown. Fronds lanceolate-oblong, 5-pinnat« 

 45^60 c.M. long. Pinnae lanceolate, the lowest largest, short-stalked, 10 — II 

 c.M. long. Pinnulae ovate-oblong, sessile, obtuse, the base cuneate, pinnatific 

 or pinnate. Segments obtuse, erecto-patent. Texture subcoriaceous; rachii 

 naked, slender, pale-brown; veins pinnate. Sori in 1 row on each side of thi 

 costae, not contiguous; indusium naked, fugacious. 



New Guinea. 



-u 



