Acrostichu7n thelypteris L.\. c. 1071. 
Aspidiiim thelypteris Sw. 1. c. 40. Eaton ^ I.e. 
I : 233. t. 30; in Gray, 1. c. 686. Clute^ 1. c. 
112. 
Nephrodlufii thelypteris Desv. 1. c. 257. Wat, 
1. c. 199. 
Dryopteris thelypteris A. Gray, 1S48. Man. 630. 
Underw, in 111. Fl: 1:15; Nat. Ferns in ; in 
Britt. 1. c. 14. 
Marsh Fern. 
Plants 3-6 dm. high; leaves lanceolate; pinnae linear- 
lanceolate, 4-10 cm. 1., deeply pinnatifid, ultimate seg- 
ments rounded, nearly entire; sori small, crowded. 
In wet or marshy ground. June- August, 
tt Leaves 2-pinnatifid \ pinnae linear-lanceolate to 
ovate,, widest it ear the in id die, 
* Pinnae 2-^ cm. wide. 
4. D. Goldiana (Hook.) A. Gray. 
Aspidium Goldianum Hook, 1822. Edinb. Phil. 
Journ. 6 : 333. Eaton,, 1. c, i : 305. t. 40 ; 1889. 
in Gray, 1. c. 688. Gluteal, c. 137. 
Dryopteris Goldianum A, Gray,, 1848. Man. 
631 . Underw. in 111. FJ. 1:17; Nat. Ferns 1 13 ; 
in Britt. 1. c. 15. 
Nephr odium Goldianum Hook, <& Grev, Icon. 
Fil. t. 102. Waters,, 1. c. 230. 
42 
