Bulletin - United States National Museum - Smithsonian Institution

104 FLORA OF WASHINGTON AND VICINITY.
iVeihena. offici7i alls, L. European Vervain.
Georgetown. June.
t Verbena urticaefolia, L. Nettle-leaved Vervain. White Vervain.
Usually more or less covered with a white mold which seoms to be peculiar to
this species. Last of July.
tVerbena angustifolia, Michx. Narrow-leaved Vervain.
June.
tVerbena hastata, L. Blue Vervain.
July.
Lippia lanceolata, Michx. Fog-fruit.
July.
LABIAT-ai.
Mint Family.
t Trichostema dichotomum, L. Blue Curls.
The piuk-flowered variety also occurs here. September.
tisanthus caeruleus, Michx. False Pennyroyal.
Flats above the Outlet Lock. August.
tTeucrium Canadense, L. American Germander. Wood-Sage.
First half of July.
tCollinsonia Canadensis, L. Collinson's Flower. Horse-balm. Rich-weed.
Stone-root.
Root a large corm-like tuber from which proceed long, slender fibres. First half
of September.
Perilla ocimoide'i, L., var. o-ispa (Gray?). Beefsteak Plant.
Crystal Spring. Escaped. First half of September.
t Mentha rm(?is, L. Spearmint.
Last of .July or first of August.
Mentha piperita, L. Peppermint.
August, September.
tMentha Canadensis, L. Wild Mint.
August.
tLycopus Virginicus, L. Bugle-weed.
September.
ILycopus rubellus, Moench. \_L. Europceus, L , var. integrifoliua, Gray.] Water
HOARHOUND. GiPSYWORT.
Lycopus sinuatus. Ell. [L. Europceus, L., var. sjjiwaiHS, Gray.]
July.
t Cunila Mariana, L. Ditt^vny.
September.
tPycnanthemum linifolium, Pursh. Mountain Mint.
July.