15, ATHYRIUM Roth, 1800. 3 
Athyrium (a vocabulo abvpos derivatum) Roth, Cat. 
Botanic. 2: 143. 
Robust ferns. Rootstocks creeping, usually covered 
by the persistent leaf-bases. Leaves pinnate to 3-pinna- 
tifid. Sori more or less curved. 
| Leaves pinnate. 
1. A, pycnocarpon (Spreng.) Tm. 
Lonchitis maxima folits plants ¢. e. non dentatis 
&éc. Banist.; Ray, Hist. 2: 1927. 
Asplenium angustifolium L. C. Rich.; Michx. 
Fl. 2: 265, not Jacquin, 1786. Eaton, Ferns 2: 
73. t. 56. ff. 1-3; inGray Man. 685. Underw. 
in Hl. Fl. 1: 24; Nat. Ferns 105; in Britt. Man, 
12. Clute, Ferns 187. Waters, Ferns 159. 
A. pycnocarpon Spreng. 1804. Anleit. 3: 112. 
Athyrium pycnocarpon Tm. 1906. Elys. Mar. 36. 
WoOoDFERN. 
Plants 5—9 dm. high; pinnae on the sterile leaves stipi- 
tate, oblong-lanceolate, 2~9 cm. long, 0.5—1.5 cm. wide; 
fertile pinnae 1-6 cm. long, 6 mm. wide or less. 
In rich woods; rather rare. 
tt Leaves 2-pinnatifid. 
2. A. thelypteroides (L. C. Rich.) Desv. 
Asplenium acrostichotdes Sw. Schrad. Jour. Bot. 
1800: 2 pt. 54. Underw. in Ill. Fl. 1: 26; in 
Britt. cnr: 
85 
Summer, 
