MENISCIUM. 



615 



ortu, membianaceum extus dehiscens, ast introrsum flexum. 

 Venulae quoad distantiani e vena formaria directione varife his 

 proximis vena ascedens, et cum ea parallelis, illis dis- 

 tantioribus magis magisque obliquis. 



In arboribus in sylvis inter Kujoo, et Soorall January, 24, 

 1836.//. Ass. 325. 



Genus certe Proximum Davallise, certe species Lindsseae 

 confr. Br. char, Pr. 1. 12. 



Davallia differs so much in habit that it probably contains 

 some new genera, as it certainly does, subgenera. It appears 

 to me that those species which have an involucrum attached 

 by the sides, will form one natural subdivision ; of this I have 

 one or two species, and the following of Hookers Icones will 

 also belong to it. 



D. contigua, 2. t. 141. 



„ flagellifera. 2. 183? 



„ emersoni. 1. 105. 



Davallia parvula, 2-t — 138. is very probably not a Daval- 

 lia, although it has the habit of some, for according to 

 the authors, it can only be a Davallia provided the lobes of the 

 pinnulae are veinless, in which case the sorus may terminate 

 the primary vein, although this would be opposed to all ana- 

 logy. 



The passing over the veins by the authors, depends upon 

 the thickness of the divisions of the fronds, which appear to 

 be almost cylindrical. 



D. lobulosa of the same work is probably a mistake: for 

 the venation of the barren and fertile fronds is so unlike, as 

 far as can be judged from the drawing, while the habit of 

 these is quite opposed to Davallioid structure. 



My species is very distinct, there is a tendency in it, to have 

 the involucrum confluent with the margin of the frond, but 

 none to have this inflexed, it approaches to Dicksonia, differ- 

 ing only in this last particular. 



Both veins terminate in sori. 



This is not uncommon in Davallia, and is the first tendency 



