SE CHARACTERS op TRIBES AND GENERA. 
SS species, all natives of the West Indies and Tropical 
. America. The principal character which distinguishes it S 
from Phlebodium is the sori being produced on free ex- 
current veinlets, that rise from the arch formed by the 
venules between the primary veins, and which character in : 
the greater number of the species is well defined, but in a 
few species with narrow linear opaque fronds the venation e 
is obscure and not so regular, which is due to the narrow- 
ness of the fronds; great confusion exists as regards the ` 
synonyms of the species of this genus. 
In Seeman’s “ Botany of the Herald” I have stated “that 
the general features of the so-called species of this genus 
are so much alike that the words used to describe one are ` 
in many cases quite applicable to others, the species 
varying merely in degree as to length, breadth, &c. The 
differences in the anastomosing of the veins would appear 
to indicate distinctions, uniformity is not, however, the 
rule; fronds of the same individual plant, and even 
different parts of the same frond, are observed to vary m 
the more or less branching and anastomosing of the veins ; 
. so that I fear venation is of little value for specific dis- 
tinctions.” It is only by seeing them growing side b 
e side under cultivation that the difference of their sp 
ance appears manifest. 
* Fronds simple. 
Sp. C. ensifolium (Willd.) v v.); C. angustifolium (Su. 
(vv); C. lucidum (Bory) (v v.); C. rigidum, (J. Sm. Fe 
Brit. and For.) ; C. fasciale ( Willd.) (v v.) ; C. repens (Lit 
(v v.); C. Phyllitides (Linn.) (v v.) ; C. costatum ‘(Kae 
(v v); (C. nitidum, J. Sm. Ferns, Brit. and For.) ; C. brevi- 
folium (Link) (v v.); C. sphenodes, (Kze.) 3 e imi 
g. Sm. Bot. ce: Herald). 
