LINDMAN, AMERICAN SPECIES OF TRICHOMANES SM. 



53 



Tr. xnmctatum, however, possesses a very peculiar vena- 

 tion, which will doubtless always distinguish it from the 

 sphenoides- groxx^ (and from Tr. pusillum). In sphenoides and 

 its allies all ultimate venules are similar, and all of uniform 

 breadth as far as they go, or tapering slightly towards the 

 point. In jmnctahim, on the contrary, there are finer and 



Fig. 31. A — C Trichomanes punctatmn (Poir.) Hook, et Grev. ememl.: A 

 from French Guiana, coll. by Sagot. in 1858: B from Brazil. Matto-Grosso, 

 Exped. 1. Regnell., n. A 2903: C from Cuba, Wright n. 952 (ex parte: the rest 

 is Tr. lineolatum). — D, E Trichomanes Uneolatum (V. D. B.) Hook., D 

 ajiex and involucres of large fronds from Cuba. Wright 915 (ex parte) and 

 952 (ex parte). E base of a frond. — (X 7). 



coarser veinlets mixed, all round the frond, and the veins, or 

 at least all the thicker ones, get slightly broader towards 

 the end, rising \Qvy slender from an other vein, but reaching 

 the margin of the frond with gradually dilated extremities. 



