Pycnanthemum tenuifolium Schrad.

Herbarium of
Rancho Santa Ana Botanic Garden [RSA]
Pycnanthemum tenuifolium Schrad.
Det. Keir Morse 4/2/2018
Louis C. Wheeler 5292	10/26/1940
Lamiaceae
United States. Washington, D.C.
Potomac River: 1/2 milie below Chain Bridge.
Small clumps on rocky, sunny flats.
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