The Flora of the Cayuga Lake Basin 35 



5. OPHIOGLOSSACEAE (Adder's Tongue Family) 

 a. Veins reticulated ; sterile segments entire ; sporangia coherent in a simple spike. 



1. Ophioglossum 

 a. Veins free ; sterile segments deeply lobed, pinnate, ternate, or even twice com- 

 pound ; sporangia separate, in panicles, rarely in a simple spike. 



2. Botrychium 

 1. Ophioglossum (Tourn.) L. 



1. O. vulgatum L. Adder's Tongue Fern. 



Damp sterile turfy acid (?) pasture land over gravels, and borders of swamps; 

 rare. June 15-July. 



Around Headwaters Swamp, 1924 (A. M. VanDeman) ; w. end of Mud Creek 

 Swamp (W. C. Muenscher) ; McLean, "near McLean Bogs" (D. in C. U. Herb.) 

 and between the railroad and Mud Pond (E. E. Barker) ; one mile e. of East Lansing 

 (A. A. Wright) ; meadow, Montezuma. 



P. E. I. to Ont., southw. to Fla., including the Coastal Plain. Found also in 

 Eurasia. 



2. Botrychium Sw. 

 a. Fronds small or of medium size, 5-15 (25) cm. tall; sheathing base of stalk com- 

 pletely closed around the bud ; sterile part of frond fleshy. 

 b. Sterile part of frond sessile or short-stalked, inserted at various heights, small, 

 pinnate, rarely simple, its segments crenate or entire, obtuse. 

 c. Segments of the sterile part obovate. 



d . Veins forking repeatedly ; sterile part of frond pinnatifid, bent over at apex 

 in the bud, inserted toward summit of plant. 1. B. Lunaria, 



var. onondagcnse 

 d. Veins forking from base of lobes ; fronds smaller, the sterile part little 

 divided, erect in the bud, inserted at base of plant. 



[B. simplex] 

 c. Segments of the sterile part oblong, often crenate at apex; veins repeatedly 

 forking ; sterile part inserted toward summit of plant. 



2. B. matricariae folium 

 b. Sterile part sessile near the summit of the plant, subternate, its ultimate segments 

 narrow, acutish (see also 3d b). 3. B. angustisegmentum 



b. Sterile part long-stalked, inserted near the base of the plant, ternately decom- 

 pound. 

 c. Ultimate segments ovate-oblong, acutish. 4. B. disscctum 



c. Ultimate segments ovate or obvate, obtuse or rounded, tending toward 

 flabelliform. 5. B. ternatum, 



var. intermedium 

 a. Fronds large, 30-60 cm. tall ; sheathing base of stalk covering the bud but open 

 down one side; sterile part of frond sessile just above the middle of the plant, 

 membranous. 6. B. virginianum 



1. B. Lunaria (L.) Sw., var. onondagense (Underw.) House. (See Bui. N. Y. 

 State Mus. 254:13. 1924.) 



Danby, 1882 (F. C. Curtice and W. R. Dudley, in C. U. Herb.). 

 Known previously only from Onondaga Co., N. Y. 



The Danby specimens are well developed and answer very well to the descriptions 

 and figures of this variety. No other disposition of them seems possible. 



[B. simplex E. Hitchc. 



Reported from Danby by Dudley (see Peck, Rept. N. Y. State Bot. 36:40. 1884), 

 but the Dudley specimens in the C. U. Herb, from that locality are B. Lunaria, 

 var. onondagcnse; also reported from Botrychium Woods, Spring Lake (L. Griscom, 

 F. P. Metcalf, & A. II. Wright, sec Rhodora 19:33. 1917), but these specimens 

 are B. matricariae folium, \ 



