﻿8s. ASPLEMUM. § 3. EU-ASPLENIUM. 447 



^. Sori at length confluent. (23a) A. trichomanes. 



>(?.*. Sori not confluent. (236) A. exiguuiii. 



S-S- Fronds broader, 2 — 4 c.M. broad when fully developed. 



X. Stipe and rachis naked. (24) A. normale 



x.x. Stipe and rachis densely fibrillose. (25) A subavenium. 

 b.b. Pinnae linear or linear-oblong, acute or acuminate, rarely obtuse, more 

 than 2 c.M. long in the fully developed plants. 



c. Pinnae ± equally cuneate or truncate on both sides at the base. 

 d. Rachis naked. 



e. Pinnae few, not more than + 5 on each side. 



i^. Pinnae cuneate at the base. (26) A. salignum. 



:i^.^. Pinnae cordate at the base. (27) A. diversifolium. 

 e.e. Pinnae 6 or more on each sHe. 



f. Texture + herbaceous or membranaceous. 

 g. Pinnae not deeply toothed. 



h. Sori few, distant. (28) A. Labillardierii. 

 h.h. Sori numerous, close. (29) A. remotura. 

 g.g. Pinnae deeply toothed. (30) A. subaquatile. 

 f.f. Texture + coriaceous. 



X. Rachis narrowly winged in the upper part. 



(31) A. sumatranum. 

 X.x. Rachis not winged. (32) A. vulcanicum. 



d.d. Rachis scaly, chaffy or fibrillose. 



$. Pinnae broadly adnate to the rachis. Rachis fibrillose. 



(35) A. fuliginosum. 

 §.§. Pinnae not or narrowly adnate to the rachis. Rachis 

 chaffy or scaly. 

 •{•. Pinnae in ± 9 pairs, cordate at the base. 



(34) A. horizontale. 

 •{•••J*. Pinnae numerous, subtruncate at the base. 



(3S) A. longissimum. 

 C.C. Pinnae unequal-sided at the base, i. e. the acroscopical side broadly 

 cuneate or truncate and the basiscopical + narrowly cuneate. 

 1. Texture ± herbaceous or membranaceous. 



a. Fronds dimorphous, the fertile ones much longer and 



broader than the barren ones. (36) A. monotis. 



a,a. Fronds uniform, the fertile ones + as large as the barren ones. 



p. Pinnae bluntly rounded or subtruncate at the apex. 



