** Pinnules splnulose-deittate. 
7. D. Boottii (Tuckerm.) Underw. 
Aspidium Boottii Tucker7n, i843» Hovey's 
Mag. 9: 145. Eaton^X, c. 2: 175. t. 69; in 
Gray,!, c. 687. Clutc^ 1. c. 141. 
Djyopteris Boottii Underw, 1893. N^t. Ferns 
ed. 4. 117, ed. 6. 114; in 111. Fl. 1:18; in Britt. 
I.e. 16. 
Nephrodiurn Boottii Waters^ 1. e. 221. 
Boott's Fern. 
Plants 3-8 dm. high; leaves linear-lanceolate; lowest 
pair of pinnae triangular-ovate, 6 cm. more or less long, 
2 cm. or less broad at the base ; the upper pinnae nar- 
rower, 7 cm. or lessl., acuminate; pinnules, except the 
basal pair of the lower pinnae, spinulose-dentate ; the 
latter pinnules are somewhat pinnatifid ; sori small. 
In m o i s t w o o d s. 
Alexandria Co., Va., Hen^haiv \ Difficult Run and Springvale, 
Pahfier. 
ttttt Leaves J-pinnatif id to j-pinnate. 
* Lower pinnae broadly triangular . 
8. D. spinulosa (Retz.) O. Kuntze. PI. 7. 
Polypodium splnitlosa Retz, 1795. Fl. Scand. 
ed. 2. 250. 
Aspidii^m spinulosum Sw, i8or. Schrad. Jour. 
Bot. 1800: 2 pt. 38. Eaton,^ 1. c. 2 : 163 ; in 
Gray 1. c. 687. Clute^ 1. c. 
46 
