Pycnanthemum incanum (L.) Michx. - Hoary Mountain Mint


 

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Pycnanthemum incanum - (image 1 of 5)

 

Taxonomy

Family: Lamiaceae

Habitat

Upland woods, clearings.

Associates

 

Distribution

VT and NY to southern OH and southern IL, south to NC and TN

Morphology

Herbaceous perennial; stems to 1 m or more, branched above, finely puberulent to tomentose above; leaves ovate, lance-ovate, or oblong, acute or short-acuminate, serrate, obtuse or rounded at the base, whitened beneath with very fine hairs and often also hirsutulous on the veins, the main leaves 5-10 cm long and 1.5-3.5 cm wide, on petioles 5-15 mm; heads relatively loose, 1.5-3.5 cm wide; bracts and calyx finely canescent or tomentulose; calyx lobes triangular, acute or barely acuminate, tending to be bristle-tipped, the lower 1-1.5 mm, the upper 0.5-1.0 mm; corollas white, mottled with purple, the lower lip 2-3 mm.

Notes

Flowers mid to late summer

Wetland indicator: NA

Similar to P. muticum but with a less dense inflorescence and the calyx zygomorphic (the upper lip shorter than the lower lip rather than about equal in length).

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.

 


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 Michael Hough © 2018