Cimicifuga racemosa  L. - Black Cohosh


 

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Cimicifuga racemosa - (image 1 of 5)

 

Taxonomy

Family: Ranunculaceae

Habitat

Woodlands, wooded slopes.

Associates

Acer saccharum, Actea pachypoda, Adiantum pedatum, Agrimonia pubescens. Anemone virginiana, Aralia racemosa, Carpinus caroliniana, Cornus alternifolia, Cornus racemosa,  Eupatorium rugosum, Hepatica acutilobia, Ostrya virginiana, Quercus rubra, Rhus radicans, Smilax ecirrhata, Solidago flexicaulis, Solidago ulmifolia, Staphylea trifolia, Ulmus americana, Vibrunum lentago, Viola sororia.

Distribution

MA west to NY, OH, IN and MO, south to SC, VA, and TN.

Morphology

Herbaceous, poisonous perennial to 2.5 m. Leaves ternate and then pinnately single or doubly compound; leaflets rotund to oblong, coarsely and sharply toothed, mostly less than 10 cm long, cuneate to cordate at the base. Flowers foul-scented, in long, branched, slender racemes to 80 cm long; sepals petaloid, white, 5 mm; petals absent; stamens 8-10 mm; staminodes present, oblong or oblanceolate, 2-3mm; ovary usually 1, sessile; style stout; follicle firm-walled.  

Notes

Flowers June and July

Wetland indicator: Upland

A showy plant, the flowers stand out in summer woods.

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.

 


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 Michael Hough 2004