Thalictrum pubescens Pursh - Tall Meadow Rue


 

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Thalictrum pubescens - (image 1 of 6)

 

Taxonomy

Family: Ranunculaceae

Habitat

Rich woods, wet meadows, stream banks.

Associates

 

 Distribution

Labrador and Quebec west to Ontario, south to southern NC, TN, and IN.

Morphology

Herbaceous perennial from a short crown, to 1-3 m. Cauline leaves sessile, glabrous above and usually minutely puberulent beneath; leaflets mostly 3-lobed, mostly over 15 mm. Flowers all or mostly unisexual, in a more or less pyramidal inflorescence; sepals 2-3.5 mm, more or less elliptic and rounded; filaments white, dilated above, often wider than the anther, constricted at the tip; anthers narrowly obovoid, blunt, 0.8-1.5 mm; stigmas spirally-curved, 0.5-2 mm. Achenes 3-5 mm, a third to half as wide, somewhat glandular, dark when dry, in more or less subglose heads.   

Notes

Flowers June to August

Wetland indicator: Facultative Wetland +

Looks very much like T. dasycarpum.

References

Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second Ed.

The New York Botanical Garden. Bronx, NY

 

Swink, F. and G. Wilhelm. 1994. Plants of the Chicago Region.
Indiana Academy of Science. The Morton Arboretum. Lisle, Illinois.

 

USDA, NRCS. 2002. The PLANTS Database, Version 3.5 (http://plants.usda.gov).

National Plant Data Center, Baton Rouge, LA 70874-4490 USA.

 


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 Michael Hough 2009