4Sa. PTERIS. § 1. EUPTERIS. C*. BIPINNATIF[DAE. 361 



lower ones cut down to the rachis below into 1 — 3 pairs of oblong, sharply 

 toothed pinnulae, which are often I'/j c.M. hroad, the higher ones simple, 

 decurrent, often joined. Texture herbaceous to subcoriaceous ; rachis and 

 surfaces naked; veins not very conspicuous, often 1—2 X forked. Pinnae 

 of fertile fronds long, linear, narrow, entire or toothed at the apex, erect, 

 simple, forked or pinnate at the base with linear segments. — Exceedingly 

 variable. 



Var. Wictoriae: Fronds with broad, whitish bands running down 

 the costae. 



Var. periiiix.ta: Apex of fertile fronds elongated into a linear, 

 caudiform appendage much exceeding the plant, furnished with irregular, 

 short, obtuse lobes. 



Malaya ; Trop. -Australia, Polynesia, China, North. India. 



* (14) Pt. serrulata, i. f., Hk. Bk., Syn. Fil., 1S5; Pt. muUifida, 

 Pair., C. Chr., Ind. Fil. 



Stipes IS — 25 c.M. long, erect, wiry, naked, pale or brownish. Fronds 

 20 — 45 c.M. long, 15—25 c.M. broad, oyate, pinnate, the main rachis winged 

 by the decurrent and confluent bases of the piniiae, the wing growing gra- 

 dually narrower downwards, sometimes wanting between the 2 lowest pinnae, 

 S'/j — 5 m.M. broad at the top of the rachis. Pinnae 4 or more on each side, 

 opposite, the upper ones simple, often 10 — 15 c.M. long, 3 — 7 m.M. broad, 

 acute or acuminate, with the edges + parallel, serrate in the barren region, the 

 lower ones with several (rarely 1 or few), long, linear, erecto-patent pinnulae 

 on each side. Texture scarcely coriaceous; rachis and both surfaces naked; 

 veins distinct, simple or forked. Indusium slightly intramarginal, narrow, 

 membranaceous. 



In cultivation. — Orig. loc: China, Japan. 



(15) Pt. sumatrana, JBfc., Journ. of Bot., XIX, 367. 



Stipes naked, castaneous like the rachis, + 15 c.M. long. Fronds doltoid, 

 20 — 25 c.M. long, pinnate. Pinnae + 5— 6-jugate below the simple terminal 

 one; upper lateral pinnae decurrent to the next lower pair, simple, linear, 

 7 — 10 c.M long, 8 — 12 m.M. broad, the lowest ones with 2 large segments 

 on the lower side, the apices strongly inciso-crenale. Texture subcoriaceous; 

 surfaces naked; veins obscure, immersed, fine, simple or forked. — Near Pt. 

 serrulata, L. f. 



Sumatra. 



