have received American specimens from Mr. O a k e s , Mr. T> e a 
and Mr. B o o 1 1 , the latter accompanied bv living plants, which 
have been growing for two jears at Leominster, side bv side with 
others from Ljnn ; and although Mr. Lea, of Cincinnati, in- 
forms me that Dr. Torre y considers the American plant dis- 
tinct, I must confess that the two appear to me to be identical. 
* Pinnae obtuse. 
a. D. cristata mariana. PL G. 
Plants 7 dm. or less high ; leaves Hnear or nearly bo, 
2-pinnatifid ; pinnae subequal, ovate-oblong, ol^tuse, 5 
cm. or less 1., 3 cm. or less wide; lobes crowded, obtuse, 
sharply serrate ; veins forking repeatedly ; sori few, about 
as many as the lobes and borne on the free veinlets, ad- 
jacent to the midrib of the pinna ; indusium flat, smooth. 
In moist w o o d s . Mav-Au<xust. 
Montgomery Co., Md. Fairfax Co., Va. 
Pinnae acute. 
fS. D. cristata lancastriensis (wSpreng.) PI. G. 
A^pidiuniiancastrienseSpreng. 1804. Anl. 3: 
Plant!- 6 dm. more or less high ; leaves lanceolate ; low- 
er pinnae triangular-ovate^ 4 cm. or less 1., the uppt r ob- 
long, acute, 8 cm. or less 1. ; lobes rounded, serrate, sinu- 
ses rather open ; sori about 6 to each lobe. 
In m o i s t w o o d s . 
44 
May- August. 
