OPHIOGLOSSACEAE. 



Vol. I. 



9. Botrychium silaifolium Presl. 

 Leathery Grape-fern. Fig. 12. 



B. silaifolium Presl, Rel. Haenk. i : 76. 1825. 

 Botrychium ternatum subvar. intermedium D. C. 



Eaton, Ferns N. Am. 1 : 149. 1878. 

 B.occidenlaleUnderw. Bull. Torr. Club, 25 : 538. 1898. 



Leaves single or sometimes two, 8'-i8' long, 

 thick and fleshy, coriaceous in drying, glaucous, 

 the common stalk short and stout, wholly under 

 ground; bud silky pubescent, the sporophyl and 

 sterile blade both bent down. Sterile blade broadly 

 triangular or subpentagonal, 4'-8' broad, nearly 

 as long, subternate, the stalk i'-4' long, the basal 

 pinnae large and 3-pinnate, the ultimate segments 

 numerous, ovate to obovate, obtuse, cuneate, ad- 

 nate, the margins irregularly crenulate; sporo- 

 phyl 2-5-pinnate, long-stalked, stout and diffuse. 



In moist meadows, sandy pastures and borders of 

 low woods, northern New England to British Co- 

 lumbia, Oregon, Idaho and Minnesota. Aug.-Sept. 



10. Botrychium lanceolatum (S. G. Gmel.) 

 Angs. Lance-leaved Grape-fern. Fig. 13. 



Osmunda lanceolata S. G. Gmel. Nov. Comment. 



Acad. Petrop. 12: 516. 1768. 

 B. lanceolatum Angs. Bot. Notiser, 1854 : 68. 1854. 



Leaves 2'-ii' long, fleshy, the common stalk 

 nearly all above ground, long, usually three- 

 fourths the length of the plant; sporophyl bent 

 down in the bud, the sterile blade recurved upon 

 it. Sterile blade sessile, f'-2i' broad, nearly as 

 long, either subternately parted with divisions 

 acutely pinnatifid, or broadly deltoid, with 3-4 

 pairs of deeply pinnatifid pinnae, the segments 

 ovate or ovate-oblong and lobed; sporophyl 

 short-stalked, 2-3-pinnate, the branches usually 

 stout and diffuse. 



In meadows and moist woods, Nova Scotia to 

 Alaska, New Jersey, Pennsylvania, Ohio, Colorado 

 and Washington. Europe .and Asia. June-July. 



11. Botrychium virginianum (L.) Sw. 

 Virginia Grape-fern. Fig. 14. 



Osmunda virginiana L. Sp. PI. 1064. 1753. 

 Botrychium virginianum Sw. Schrad. Journ. Bot. 



1800 2 : m. 1801. 

 B. gracile Pursh, FI. Am. Sept. 656. 1814. 



Leaves 4'-2i' - long, the common stalk slen- 

 der, nearly all above ground, comprising one- 

 half to two-thirds the length of the plant; 

 bud pilose, both the sporophyl and sterile 

 blade wholly bent down. Sterile blade nearly 

 or quite sessile, spreading, membranous, del- 

 toid, 2'-i6' broad, nearly as long, ternate, the 

 short-stalked primary divisions 1-2-pinnate, 

 the numerous segments 1-2-pinnatifid, the ulti- 

 mate segments oblong, toothed at the apex; 

 sporophyl long-stalked, 2-3-pinnate. 



In rich woods, Labrador to British Columbia, 

 Washington, Arizona, and the Gulf states. Mexico, 

 Europe and Asia. June- July. Rattlesnake-fern, 

 Hemlock-leaved-moonwort. 



