﻿430 35. ASPLENIUM. § 5. EU-ASPLENIUM. 



X. Veins distinctly visible beneath. 



(37) A. macrophyllum. 



X.X. Veins sunk, indistinct beneath. 



(38) A. paradoxum. 



C.C.C. Pinnae dimidiate or sitbdimidiate, i. e. at least the lower ' 3 of 



the lower side cut away along the costa. 



d. The lower side of the pinnae quite cut away. 



(59) A. heterocarpum. 

 d.d. The lower ^3 — ^/s of the lower side cut away. 



e. Stipe and rachis purple or black-brown, sometimes grey. 



(60fl) A. unilaterale. 

 (606) A. filipes. 

 e.e. Stipe and rachis green. (61) A. obscurum, 



«.«. Fronds pinnate; pinnae deeply pimialifid, ov pinnate at the base. 

 1'. Fronds small or middle-sized, under 45 c.M. long. 

 3'. Secondary segments undivided. 



3'. Pinnae ovate, the lobes cuneate-oblong. (62) A. denticulatum. 

 3'.3'. Pinnae linear-lanceolate, the lobes linear-cuneate. 



(63) A. Warburgianum. 

 3'. 3'. At least the lower secondary segments on the anterior side 

 shallowly or deeply 2 — 3-fid (*). 



•{•. Lowest anterior segment rather broader than long, + 



spreading. Sori short, oblong. (64) A. laciniatum. 



•{•.•{•. Lowest anterior segment longer than broad, erect o-patetit. 



. Sori long, linear. (65) A. Hagenii. 



±'.1'. Fronds large, more than 45 c.M. long when fully developed. (') 



(66) A. horridum. 

 a.uM. Fronds more copiously 2 — 4-pinnate (^). 



h'. Ultimate segments small, lanceolate-spathulate, acute or incised with 

 2 — 3 sharp, entire teeth at the apex. (67) A. tenuifolium. 



b'.b'. Ultimate segments oblong or cuneate-oblong, the outer edge more copi- 

 ously crenulate to dentate, or inciseil and crenulale to dentate. 

 c\ Fronds 2 — 3-pinnate. 



d'. Rachis pilose, fibrillose or scaly, at least when young. 



(') See also A. stereophyllum, Kze. 



(•) With regard to the determination of the species a very difficult group and not 

 always clearly distinguished from group a.a. 

 (') See also A. caudatunr, Forst. 



