174 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Except for its very dense hairy covering, P. ferruginea agrees closely with the largest 
species of Pityrogramma in every respect and has no near relationship with Gymnop- 
teris, in which genus it was placed by Underwood. 
NEUROGRAMMA. 
The genus Neurogramma, proposed by Link! in 1841, has as its type 
Acrostichum rufum L., and thus, like Gymnogramme, is exactly 
synonymous with Gymnopteris Bernh. (not Presl) and has no stand- 
ing. As taken up by Diels,? however, it is greatly extended and 
contains, besides the type species and its near allies, several distinct 
elements, among them the generic group which, as shown above, 
must bear the name Pityrogramma. 
The name Gymnopteris is not employed by Diels in the sense of 
Bernhardi and Underwood, but is instead applied erroneously to 
the group called Leptochilus by Christensen, which is also, roughly, its 
application by Presl. 
CONIOGRAMME. 
Reference has been made under Gymnopteris (p. 172) to a Mexican 
plant described as Gymnogramme subcordata Eaton & Davenp., 
which was transferred to Gymnopteris by Underwood. A critical 
examination of the type material of this species in the U. S. National 
Herbarium shows that it is, instead, a member of the genus currently 
known as Coniogramme and that it is nearly related to Coniogramme 
japonica, as Katon had suggested. The venation is correctly described 
by Davenport as follows: 
Veins uniting below into two series of long irregular areole, the 
lower series parallel with the costa, the secondary series obliquely 
ascending, forked once or twice above and free to the edge; sori con- 
fined to the free veinlets. 
The venation is not, however, shown in the published illustration. 
Large fronds are subbipinnate, a feature which, in connection with 
the peculiar venation and stramineous stipes and rachises, makes the 
reference of this plant to Coniogramme a very natural one. It may 
be known as Coniogramme subcordata (Haton & Davenp.) Maxon. 
Coniogramme Fée,* founded upon the free-veined forms of this 
alliance, is regarded by Diels and Christensen as including Dictyo- 
gramme Fée,° which was founded upon the areolate Japanese species, 
already mentioned, first described as Hemionitis japonica Thunb. 
Habitally the two groups are alike and should probably be joined. 
It is possible, however, that Presl’s name Dyctiogramme, published 
! Link, Fil. Hort. Berol. 138. 1841. 
2 Diels in Engl. & Prantl, Pflanzenfam. 14: 262. 1899. 
3 Contr. U. S. Nat. Herb. 5: 138. pl. 16. 1897. 
4 Gen. Fil. 167. 1852. 
5 Gen. Fil. 170. 1852. 
