+ Sterile leaf-segment ternate, sessile, 
i. B. virginianum (L.) Sw. Biel 
Osmunda fronde pinnatifida caulina, fructifi- 
cattontous spicatis. . Gronx. Fi. Virg. 196. 
Osmunda virginiana L. Sp. Pl. 1064. 
Botrychium virginianum Sw.\.c. 111. Eaton, 
1876. Peis IN Agi 2 2253. (.43 san totay Man 
695. Underwo, ia WF, ae a Nat Werns 2743 
in Britt. Man. 4. Clute, Ferns 41. if. Waters, 
STeMUSH25 5 OA 76 
2 
VinGINIAN GRAPE FERN. 
Plants 2--6 dm. high; the divisions of the ternate leaf- 
segment 2-pinnate ; sporophy!l 2--3-pinnate, iong-stalked, 
sometimes forking near its middle forming two panicles ; 
pinnules of the sterile segment are occasionally spore- 
producing. [Torreya 5: 160. f. 1.] 
Frequentin rich woods. June-August. 
A slender form [&. gracile Pursh, 1814. Fl. Am. Sept. 
2: 656.] is found occasionally with the type. 
Tt Stercle leaf- segnient iernate, stalked. 
* Piunules obliquely ovate or oblong-lanceolate. 
2. B. obliquum Muhl. Eleslss 
Lunaria multifido folio. . crasso ex Terra Ma- 
riana. . Pluk. 1700. Mant. 120. t. 427. £.7. 
Botrychium obliquum Muhl.; Willd. 1810. Sp. 
Pl. 5: 63. Underw. Nat. Ferns 72; in Britt. 1, c. 
3. Clute, 1. c. 54. Waters, \. c. 324. 
ll 
