Flora of Vermont 159 



OPHIOGLOSSACEAE. ADDER'S TONGUE FAMILY 



BOTRYCHIUM. Moonwort 



B. laiiceolatiiiii (Gmel.) Angstroem, var. angustisef?iiieiituiii Pease & 



Moore. Lance-leaved Grape Fern. Moist hollows in cool open 



woods ; rare. 

 B. Lunaria (L.) Sw. Moonwort. Very rare. Willoughby House, West- 

 more, (G. H. Tilton). 

 B. oMiquTim Muhl. (B. ternatum forma obliquum Milde). Grape Fern. 



Moist gravelly slopes; frequent. Var. dissectiim (Spreng.) Clute. 



(B. dissectum Spreng.). Cool loamy soil, open fields; occasional. 



Var. oneidense (Gilbert) Waters. Vermont, Miss Gilman, Gray's 



Manual ed. 7. 

 B. raiiiosnm (Roth) Aschers. (B. matricariaefolium A. Br.; B. neglec- 



tum AVood). Rich moist woods; occasional. 

 B. simplex B. Hitchcock. Little Grace Fern. Hilly pastures and open 



woods; occasional. Var. coiiipositum (Lasch) Milde. Hartland, 



(Nancy Darling) ; St. Johnsbury, (Bridget M. Rooney). 

 B. ternatum (Thunb.) Sw., var. intermedium D. C. Eaton. (B. silai- 



folium Presl.). Ternate Grape Fern. Old pastures and copses; 



occasional. Var. rutaefolium (A. Br.) D. C. Eaton. (B. matri- 



cariae Spreng.). Old fields; rare. 

 B. yirginianum (L.) Sw. Rattlesnake Fern. Rich woods; common. 



OPHIOGLOSSUM. Adder's Tongue 

 0. Tulgatum L. Moist meadows and pastures; occasional. 



EQUISETACEAE. HORSETAIL FAMILY 



EQUISETUM. Horsetail 

 E, arvense L. Common Horsetail. Moist gravelly or sandy banks; 



common. 

 E. fluviatile L. (E. limosum L.). Pipes. Shallow water with muddy 



bottom; common. A form with the branches bearing numerous 



small spikes occurs, Burlington, (Mrs. N. F. Flynn). 

 E. hyemale L., var. affine (Engelm.) A. A. Eaton. Common Scouring 



Rush. Moist gravelly banks; common. Forma polystachyuni 



Prager. Burlington, (Blake). 

 E. hyemale L., var. intermedium A. A. Eaton. Scouring Rush. Moist 



sandy soil, Burlington, (Howe). 

 E. litorale Kiihlewein. Shore Horsetail. Gravelly shores of Lake 



Champlain; rare. 

 E. palustre L. Marsh Horsetail. Wet sandy shore of Lake Champlain, 



Burlington, (Pringle) ; Brandon, (Button) ; Windsor, (W. H. 



Blanchard, Rugg) ; Colchester, (Blake). 

 E. pratense Ehrh. Newark, (Kennedy); Brattleboro, (Wheeler). 

 E. scirpoides Michx. Moist cool woods; occasional. 

 E. sylTaticum L. Moist shady places; common. 

 E. variegatum Schleicher. Gravelly shores; occasional, '^- " 



