40G. WiEGAXD : Some Si-ecies of Bidexs 



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W. Dt-auc ; Rolunson, no. 2>^i. Massachusetts: Boott ; Collins; 

 Rich; French; Young. Rhode Island : Thurbcr. New York : A. 

 M. Vail ; Kearney; Brit ton ; Ro7oIee,et al. ' New Jersey: Torrey; 

 Commons ; Ilalsted, no. 36. Pennsylvania : Smith (upward}' barbed 

 awns). West \'irginia : J/z/Ay..?//^'-//, no. 778. Florida: Chapman. 

 Alabama : Buckley. Louisiana : Hale. , Texas : Lindheimer ; 



Revcrchon. M 



R 



S. Weller. Illinois : Wolf 



Forest. Nebraska : Rydberg, no. 1707 ; Clements, no. 2894. 



Bidens melanocarpa pallida var. nov. 



Slightly glaucous, branches all ascending or erect, conspicu- 

 ous!)- overtopping the terminal shoot : leaves smaller, on shorter 

 more margined petioles (3-4 cm. long), dull, veins inconspicuous, 

 the lower ternate, the upper undivided ; leaflets shorter, ovate-lan- 

 ceolate, short-acuminate, the terminal contracted at the base into a 

 winged stalk and more or less confluent with the lateral, coarsely 

 and sharply few-toothed : licads longer than in the type, on longer 

 peduncles ; outer involucre erect, foliaceous (2-4 times length^of 

 head), rarely ciliate ; inner bracts oblong lanceolate : corolla of 

 disk flowers larger (3-4 mm.), often 4-toothed, more nearly yellow, 

 shorter than the awns : achenes (5-10 mm.), not papillose : awns 

 longer (about y^ length of achene). 



Nova Scotia to New York and Illinois. 



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Specimens examined from :— Nova Scotia: Halifax, Brother 



Peter, 1896. Illinois: Wolf. New York : Ithaca (many speci- 

 mens). 



This species is quite widel)- distributed throughout the eastern 

 portion of North America, and is everywhere very abundant. In 

 the New England states it seems to be the most common type of 



f^ 



farther westward 



B.frondosa, with which it has so long been confused, is equally 

 abundant. It usually prefers rich damp soil and forms a large part 

 of the vegetation along roadsides, In waste places, and on the mar- 

 gins of rivers and ponds during the autumn months. In struc- 

 tural characters it is more distinct than are B. ccrmia and B. laevis, 



rated from B. frofidosa. It is 



related 



■P 



W 



posed localities it often has much narrower leaflets and is 5 -pinnate, 

 but when in shaded places the leaves are usually only 3 -pinnate 



