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Project Name Data (Last Modified On 8/11/2017)
Acceptance : Accepted
Project Data     (Last Modified On 7/9/2009)
Status: Introduced

 

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2a. var. lupulus

H. americanus Nutt.

Stems relatively sparsely hairy at the nodes. Leaf blades tending to have fewer lobes, those of the larger leaves unlobed or more commonly 3-lobed, all of the leaves with 3 main veins from the base, the undersurface sparsely to moderately pubescent along the veins, glabrous between them, the midvein with mostly fewer than 20 hairs per cm, also moderately glandular with stalked glands, the surface between the veins mostly with fewer than 25 glands per square cm. July–October.

Introduced, uncommon and widely scattered in the state (native of Europe; introduced in the northeastern U.S. west to Wisconsin and Missouri, disjunct in California and possibly Oregon; Canada, Asia). Banks of streams; also railroads and disturbed areas.

This variety was cultivated widely in the eastern United States from the 1600s to the Prohibition era, and many of the herbarium collections from the northeastern United States are said to be of this variety (Small, 1978).

 
 


 

 
 
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