﻿438 55. ASPLENIIIM. § 1. THAMNOPTERIS. 



h.h. Fronds obtuse, acute or acuminate, not rostrate. 



c. Texture ± coriaceous throughout; fronds narrowed towards the 

 base. 



d. Fronds rather obtuse. (3a) A. pachyphyllum. 



d.d. Fronds rather acute or short-acuminate. 



e. Edges cartilagineous, very prominent, (ob) A. curlisorum. 



. e.€. Edges not or hardly cartilagineous, not conspicuously 



prominent. (3c) A. nidus. 



c.c. Texture membranaceous or subcoriaceous ; base of fronds broad, 



scariose or chartaceous. (4) A. cymbifolium. 



(1) A. colubriiiiiiu, Christ, Bull. Herb. Boiss., 2-^ S^rie, VI, 999 ; 

 — var. taeniophyllum, Copel., Philipp. Journ., 11, 131. 



Fronds tufted, linear, loriform, to 85 c.M. long, 1 '/a — 3 c.M. broad, the 

 apex acuminate, the edge entire, the base narrowed into a short stipe. Tex- 

 ture coriaceous, rigid; costa stout, surrounded on each side by black 

 lines (the costa or the frond?), black-fuscous, prominent beneath, sul- 

 cato-concave above; under surface furfuraceous with minute, pale scales; veins 

 prominent, black, numerous, nearly spreading, simple or geminate at the base, 

 + l^/j m.M. apart. Sori numerous, occupying the upper half of the frond, 

 slightly immersed, black-brown, each pair separated by a sterile vein; indu- 

 sium persistent, cartilagineous, black, with a pale margin. 



Var. taeiiiophylluiu : Stipes 2 — 5 c.M. long; fronds narrowed 

 very gradually into the stipe; costa keeled beneath, 2-angular above, concave 

 between the angles at the base; under surface naked; veins inconspicuous; 

 sori often separated by 2 sterile veins. 



Luzon; — var. taeniophyllum: Mindoro. 



* (2) A. Simonsiaiiiiiii, JHfc., Hk. Bk., Syn. Fil., 191; Hk., 

 Icon. PI., X, tab CMXXV; A. nidus L., var. Simonsianum, Christ, Bull. Herb. 

 Boiss., VI, 151; Thamnopteris Simonsiana, Moore, Bedd., Ferns Br.I., II, tab. 

 CCXLVIII. 



Fronds 30 — 45 c.M. long, S'/j — 4 c.M. broad, tapering above into a 

 distinctly acuminate point and very gradually below into a short stipe, the 

 margin nearly entire, the midrib rounded and prominent below. Texture coria- 



