Plants 5 din. or more high; leaves lanceohite ; pinnae^ 
7 cm. or less L, deeply pinnatifid ; ultimate se^^ments 
oblong, obtuse; sori small. 
In moist, deciduous woods. Summer. 
Pinnae i C7n, more or less wide^ sessile^ taperl7ig 
towards the apex of the leaf. 
2. D. simulata Davenp. 
Aspzdlum simulatum Davenp. 1894. Bot. Gaz. 
19: 497. Clute^ 1. c. 123. 
Dry opt er is simulata Davenp, 1. c. as syn. Und, 
in 111. Fl, 1:16; Nat. Ferns 1 1 1 ; in Britt. 1. c. 
Nethrodium simulatum Davciip. 1. c. as syn. 
Waters^ 1. c. 305. 
Massachusetts Fern. 
Plants 6 dm. or more high ; leaves oblong-lanceolate ; 
pinnae 7 cm. or less 1., acuminate, deeply pinnatifid ; 
ultimate divisions oblong, obtuse; sori small. 
Inlow, moistw^oods. 
Glen Burnie, Md., W. Maxon. 
Lower pinnae stalked,, 1-2 cm. wide. 
3. D. thelypteris (L.) A. Gray. 
Filix pumila palustris Virg'iniana . . Pluken. 
Aim. 151. Phyt. t. 284. f. i. 
41 
