t+ Sterile leaf-segmeni ternate, sesstle. 
!. B. virginianum (L.) Sw. Pisa. 
Osmunda fronde pinnatifida caulina, fructift- 
cattontbus spicatis. . Gron. Fl). Virg. 196. 
Osmunda virginiana L. Sp. Pl. 1064. 
Botrychiun virginianum Sw.\.c. 111. faton, 
1075. Perns N. Any. 1525 36:33 in Giaw Mane 
Go5..Cuderw. in Ii Wl <4 Nate Bers: yay 
in Britt. Man. 4. Clu¢e, Ferns 41. ff. Waters, 
Ets 255.287. 
VIRGINIAN GRAPE FERN. 
Plants 2--6 dm. high; the divisions of the ternate leaf- 
segment 2-pinnate ; sporophyll 2--3-pinnate, long-stalked, 
sometimes forking near its middle forming two panicles ; 
pinnules of the sterile segment are occasionally spore- 
producing. [Torreya 5: 160. f. 1.] 
Faequent in trehayoods. June-August. 
A slender form [B. graccle Pursh, 1814. Fl. Am. Sept. 
2: 656.] is found occasionally with the type. 
Tf Stercle leaf- segment ternate, stalked. 
* Pinnules obliquely ovate or oblong-lanceoiate. 
2. B. obliquum Muhl. Pieler 
Lunaria multifido folio. . crasso ex Terra Ma- 
riana. .-Llwk. 1700. Mant.120, t.427 1-7. 
Botrychtum obliquum Muhl.; Willd. 1810. Sp. 
Pl. 5: 63. Underw. Nat. Ferns 72; in Britt. 1. c. 
3. Clute, \.c. 54. Waters, |. c. 327. 
ll 
