192 BOTRYCHIUM 



COMMON GRAPE FERN: 



Botrychium ohliquum, 

 (B. ternatum, var. obliquum.) 



Sterile frond somewhat triangular in outline, 

 with 6 or more pairs of stalked pinnae, which are 

 again pinnate or lobed, exceedingly variable in 

 their cutting, and several varieties have been 

 named; often fails to make its appearance until 

 midsummer. Fertile portion stands erect, much 

 taller than the sterile, and fruits rather heavily; 6 

 to 18 inches high. Sterile and fertile portions ter- 

 minate separate stalks springing from the base. 



Found in pastures and open woods from New 

 Brunswick and Ontario to Minnesota and south- 

 ward. 



B. ternatum, var. intermedium is similar in habit 

 to the preceding, but the ultimate segments are 

 more numerous and usually more rounded at the 

 apex. Found in open woods and pastures in New 

 England and New York. 



NOTES. 



