﻿22. DRYOPTERIS. § 1. LASTRABA. 201 



+ 60 c.M. long and ± 30 c.M. broad, 3-pinnate. Lowest pinnae largest, 

 deltoid, with the pinnulae on the lower side produced. Pinnulae multijugate, 

 lanceolate, deeply pinnatifid, or pinnate at the base. Ultimate segments oblong, 

 obtuse, entire, contiguous, 2— ^'/i c.M. long, 4 — 4^2 ni.M. broad. Texture 

 moderately firm; surfaces naked; central veins of the segments pinnate, with 

 6 — 8 erecto-patent, obscure, hidden veins on each side. Sori small, many to 

 a segment, subcostular; indusium small, membranaceous, fugacious. 

 Borneo. 



* (55) D. IRovjStnat, C. Chr., Ind. Fil. ; Aspidium Boryanum, Willd., 

 Rac, Flor. Btz., I, 178; Laslraea Boryana, Moore, Bedd., Handb. Ind. Ferns, 

 266; L. divisa, Moore, Bedd., Ferns S.I., tab. XCVII; Nephrodiuin divisuni, H/c, 

 Copel., Polypod. Philipp., 26; N. Boryanum, Bk., Hk. Bk., Syn. Fil., 284. 



Caudex + erect, clothed with thin, ovate-lanceolate scales. Stipes 

 60 — 100 c.M. long, stramineous or brownish, sometimes blackish, the base 

 winged or dilated, deciduously scaly. Fronds lanceolate to deltoid, 120 — 300 

 c.M. long, 60—100 c.M. broad. Lower pinnae longest, + 10—15 c.M. broad, 

 on stalks to 3 c.M long. Pinnulae lanceolate, sessile, cut down to a narrowly 

 winged rachis into blunt, spreading, sharply toothed lobes 5 — 15 m.M. long, 

 2 — 4 m.M. broad, which are sometimes lobed and toothed again. Texture 

 herbaceous; rachis and surfaces naked; veins simple or forked. Sori in rows 

 of 3 — 4 near the midribs of the ultimate segments; indusium fugacious. 



Malaya; Japan, South. China, North. India, Beunion. 



* (56) D. purpuras) cens, ». A. ®. JR.,« D. sparsa, 0. Ktze., var., 



C. Chr., Ind. Fil.; Aspidium purpurascens, BL, Bac, Flor. Btz., I, 174; Nephro- 

 diiim purpurascens, Hk., Spec. Fil., IV, 132, p. p. 



Rhizome erect, densely clothed with thin, entire, long, linear-lan- 

 ceolate scales. Stipes tufted, to 100 c M. long, the base densely scaly, 

 the rest slightly so. Fronds deltoid-ovate, acuminate, 60—120 c.M. long, to 

 80 c.M. broad, 4-pinnatifld, or rarely 5-pinnatifid at the base. Pinnae stalked, 

 linear-oblong, the apex acuminate, inciso-serrate. Pinnulae spreading, oblong, 

 acuminate, short-stalked, ± 5—6 c.M. long, ± 2—5 c.M. broad or broader 

 at the base. Tertiary divisions trapezio-oblong, + 3— 5 m.M. broad or broader, 

 the higher decurrent and confluent, the lower sessile, with the base obliquely 

 subtruncate, pinnatifid especially in the lower half with oblong, blunt, entire 

 or slightly emarginate lobes, the superior basal one mostly larger than the 

 others. Texture herbaceous to semicoriaceous ; main rachis neai'ly naked. 



