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Marrubium vulgare

Photo © by Michael Plagens

Observed along Camp Creek, Maricopa Co, Arizona, USA. April 2009.

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PERENNIAL HERB: Many erect stems from a perennial root stock. Mostly unbranched stems reach almost meter tall under ideal conditions. The stems are coated with matted hairs, thus appearing whitish.

FLOWER: Small white flowers are bilaterally symmetrical arranged in dense clusters along the stems at the leaf axils.

LEAVES: Nearly ovate leaves are bubbly-textured and the margins are rounded-toothed (crenulate).

RANGE: A non-native plant that has become common in semi-shady habitats along riparian streams in the Sonoran Desert. It is normally considered an invasive weed and becomes more common in areas grazed by cattle. Native to Europe and widely spread from cultivation.

FRUIT: Dry capsules with four nutlets.


Lamiaceae -- Mint Family

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Copyright Michael J. Plagens, 1999-2009