18. DRYOPTERIS Adanson, 1763. 
Rootstock creeping or stout, ascending. Leaves 2-3- 
pinnatifid. Sori orbicular. Indusium reniform or orb- 
icular, fixed by its sinus. 
+ Leaves 2-pinnatifid, pinnae linear-lanceolate. 
* Pinnae «cm. more or less wide, sessile, tapering 
both ways. 
1. D. noveboracensis (L.) A. Gray. 
Polypodium noveboracense L. Sp. Pl. 1091, 
Aspidium noveboracense Sw. Schrad. Journ. Bot. 
1800: pt. 2. 38. Haton, Ferns N. Am. 1: 49. t. 
7; in Gray, Man. 687. Clute, Ferns 120. 
Nephrodium noveboracense Desv. 1827. Mem. 
Soc, Linn. Paris. 6: 2 pt. 257. Waters, Ferns 
209. 
Deep noveboracensts A. Gray, 1848. Man. 
630. Underw. in Ill. Fl. 1: 153 Nat. Ferns 111; 
in Britt, Man. 15. 
New YorkK FERN. 
Plants 5dm. or higher ; leaves lanceolate ; pinnae 7 cm. 
or less in length, deeply pinnatifid; ultimate segments 
oblong, obtuse; sori small. 
In moist, deciduous woods. Summer. 
** Pinnae I cm. more or less wide, sessile tapering 
towards the apex of the leaf. 
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