TT1Ttt Leaves 3-pinnafid to 3-pinnate. 
* Lower pinnae broadly trt-angular. 
9. D. spinulosa (Retz.) Kuntze. | id aie 
Polypodium spinulosum Retz. 1795. F\. Scand. 
ed. 2. 250. 
Aspidium spinulosum Sw. Schrad. Journal Bot. 
1800: pt. 2. 38. Eaton, l.c. 2: 163; in Gray, 1. 
Cz00 7. Cle, Nuc, 
Nephrodium spinulosum Desv.; Hook. 1861. Br. 
Ferns t. 18. Waters, |. c. 214. 
Dryopteris spinulosa Kuntze, 1891. Revis. Gen. 
2: 813. Underw. in Ill. Fl. 1: 18; Nat. Ferns 
Dias in ritty lie, 
Woop FERN. 
Plants 5 dm. more or less in heigth; leaves ovate- 
_ lanceolate; lower pinnae 6 cm. or less in length, the 
basal pinnules exceeding the others in length; upper 
pinnae elongate-triangular to oblong, acuminate; pin- 
nules oblong, acute, decurrent, pinnatifid; lobes spinu- 
lose-dentate ; sori small, usually on to each lobe. 
In moist woods. 
** Tower pinnae triangular-ovate. 
D. spinulosa intermedia (Muhl.) Underw. Pie Gs 
Polypodium intermedium Muhl.; Willd. 1810. 
Spa Rl 5 262. 
_ This form differs from the type by its larger and more 
spreading pinnae. The basal pinnules of the lower pin- 
nae are usually equal to or shorter than the adjacent pair. 
aes : 
