﻿166 19. POLYSTICHUM. 



* (3) P. aeiileatum, Schoft (not Roth), Copel., Polypod. Philipp., 

 17; Diels, in Engl. & Prantl, Nat. Pfl.Pam., P, fig. 100, A; Aspidium aculea 

 turn, Sw., Hk. Bk., Syn. Fil., 252; — war. wilcamcum; A. vulcanicum, Bl.,En\im., 

 165; — var. subamoenum, Christ, in Warb., Mons., I, 77; — var. mucroni- 

 folium; A. mucroni folium, BL, Rac, Flor. Btz., I, 172; — var. moluccense; 

 A. moluccense, BL, 1. c, 168; — var. batjanense, Christ, 1. c. ; A. baijanense, 

 Christ, Bull. Herb. Boiss., 2e Sine, VI, 926; P. horizonlale, Copel., 1. c, 18. 

 Rhizome erect or suberect, strong, scaly. Stipes tufted, scaly, 10 — 100 

 c.M. long; the scales of 2 forms, the smaller ones slender, ressembling hairs 

 or fibrils, the larger ones ovate-lanceolate, thin, both ferrugineous. Fronds 

 50 — 80 c.M. long, 18 — 40 c.M. broad, 2-pinnate, sometimes 5-pinnate, ovate- 

 lanceolate to deltoid, acuminate. Pinnae close, numerous, ± linear-lanceolate, 

 the lowest commonly the longest, 2—4 c.M. broad near the base. Pinnulae 

 subrhomboidal, close, regular, the upper base truncate, + auricled, the lower 

 base cuneate, the margin toothed, the apex and the teeth mucronate or aris- 

 tate. Texture ± coriaceous; rachis densely, ± deciduously scaly, the scales 

 linear-lanceolate, ferrugineous, acuminate, often mixed with white or reddish, 

 + hair-like smaller ones; under surface naked or slightly fibrillose. Sori in 

 1 row on each side, ± medial or subcostal. — A variable species. — 

 or. Pinnulae at best pinnatifid, the auricle not free. 

 b. Pinnulae not pinnatijid. 



Forma typica: Pinnulae aristate. Sori + medial or subcostal, not soli- 

 tary. — Cosmopolitan. 



Var. vu9cani«59BiBi : Pinnulae rather small, subimbricate, spinuloso- 

 denlate, obscurely auricled. Sori solitary. — Java, Sumatra. 

 b.b. Pinnulae incised. 

 \av. isubaiuoenum: Philippines. 

 a.n. P nnulae more or less divided, at least the auricle + free. 



War. niucronifoliflSBii: Under surface slightly paleaceo-pilose ; pin- 

 nulae small, at best once pinnate. — Malaya; Br. India. 



Var. luoluceeniise: Under surface sparingly furfuraceous; pinnulae 

 once pinnate. — Moluccas, Philippines. 



Var. R>ai|aiicitsc : The whole plant densely clothed with cinnamon- 

 coloured scales; pinnulae large, + 3 c.M. long, the lowest pinnate or 2- 

 piunatifid. — Batjan, Philippines. 



* (4) P. obtiiSUin, a. Sm. (not Pr.), Copel., Polypod. Philipp., 17; 

 Aspidium obtusum, Kze (not Melt.), Hk. Bk., Syu. Fil., 252, Mett., Farng., IV, 



