﻿APPENDIX. 19. POLYSTir^HUM. 809 



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

 on a pinna, placed in 1 rov;>r on the anterior side of the costae, distant from 

 the margin, impressed; indusi'um minute, fugacious, 

 Luzon. 



(lb) P. obliquum, M 9ore, C. Chr., Ind. Fil.; F.caespilosum, Scholt., 

 Bedd., Ferns Br.I., I, tab. X^'vXIII; P. auriculalum, Pr., var. caespitosum^ 

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

 Bk., Syn. Fil., 493; A. obliqmi m^ Don, (oldest name); — var. luzonicum, 

 Christ, Philipp. Journ., II, 157. 



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

 tufted, slender, 5 — 20 c.M. longj 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, 1 '/2 — 3 % 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. 



Var. luzonicum: Pinnae imbricate, acutely auricled, the edge 

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

 Texture herbaceous; veins bidden. 



North. India; — var. luzonicum: Luzon. 



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



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

 40 — ,^0 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 aC'Uleate, the auricle nearly free, not imbricating. Texture herba- 

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

 on the veins. Sori naked. 



Mindanao. 



* (5) 1*. aculeatuni, Schott, — Insert as a synonym: Polypodium 

 aciikatum, L., (oldest name). 



