APPENDIX. 19. POLVSTICHUM. 809 



ceous; surfaces naked; colour yellow-green, opaque; veins forked. Sori + 6 

 on a pinna, placed in 1 row on the antei'ior side of the costae, distant from 

 the margin, impressed; indusium minute, fugacious. 

 Luzon. 



{\b) I*, obliqunm, Moot-e, C. Chr., Ind. Fil. ; F. caespitosum, ScholL, 

 Bedd., Perns Br.l., I, tab. XXXIII; P. auriculalum, Pr., var. caespitosum, 

 Bedd., Handb. Ind. Ferns, 204; Aspidium auriculalum, Sw., var. obliquum, Hk. 

 Bk., Syn. Fil., 493; A. obliquum, Bon, (oldest name); — var. luzonicum, 

 Christ, Philipp. Journ., II, 157. 



Rhizome short, thick, the scales ferrugineous, ovate, often ciliate. Stipes 

 tufted, slender, B — 20 c.M. long, stramineous as well as the rachis. Fronds 

 10 — 25 c.M. long or longer, oblong- or linear-lanceolate, rather acute, simply 

 pinnate. Pinnae rather distant, horizontal, rhomboidal-oblong, I'/j — 3 '/a c.M. 

 long, obtuse or acute, sharply but scarcely mucronato-serrate; upper base 

 truncate and obtusely auricled, lower cuneate. Texture chartaceo-membrana- 

 ceous; surfaces naked; veins forked, lowest anterior pinnate in the auricle. 

 Sori in 1 row on each side of the costae, medial or nearer the edge than the 

 costae; indusium peltate, ciliate or toothed, at length deciduous. 



l^ai*. luxonieum: Pinnae imbricate, acutely auricled, the edge 

 nearly entire, the teeth very faint, scarcely visible but nevertheless aristate 

 Texture herbaceous; veins hidden. 



North. India; — var. luzonicum: Luzon. 



(2a) P. nudum, Copel., Philipp. Journ., I, Suppl., 145. 



Rhizome ascending, clothed with long, linear, brown scales. Stipes close, 

 40 — 50 c.M. long, clothed towards the base with long, brown, often ovate 

 scales and towards the frond with paler, often smaller, crinite ones. Fronds 

 ± 70 c.M. long, ± 30 c.M. broad, the rachis clothed with brown, crinite 

 scales. Pinnae close, horizontally spreading, 15 — 18 c.M. long, ± Vj^ c.M. 

 broad, the lowest somewhat shorter. Pinnulae oblong, acute, inciso-serrate, 

 the teeth aculeate, the auricle nearly free, not imbricating. Texture herba- 

 ceous; upper surface naked, lower pale-coloured, provided with wliilish scales 

 on the veins. Sori n:iked. 



Mindanao. 



* .(3) I* aculeatum, Schott. — Insert as a synonym : Polypodium 

 aculeatum, L., (oldest name). 



