E-Flora BC: Electronic Atlas of the Flora of British Columbia

Leonurus cardiaca L.
common motherwort
Lamiaceae (Mint family)

Introduction to Vascular Plants

© Diane Williamson  Email the photographer   (Photo ID #11573)

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Distribution of Leonurus cardiaca
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Species Information

Perennial herb with fibrous root, from stout, branching rhizome; stems erect, 40-150 cm tall, branched, 4-angled, the stem with downward-facing, stiff, short hairs on the angles.
All stem leaves, the lower early deciduous; opposite, palmately 3- to 7-lobed and veined, 5-10 cm long and wide, coarsely toothed, loosely short-hairy underneath, inconspicuously stiff-hairy above; stalks about the length of blade; middle and upper leaves gradually smaller, narrower, with fewer lobes, shorter stalked; uppermost often entire.
Inflorescence of many-flowered, widely separated, axillary clusters, forming a leafy, interrupted spike; bracts leaf-like; corollas tubular, pale pink, 8-12 mm long, 2-lipped, the upper lip white-hairy, the lower lip 3-lobed; calyx tubes firm, 3-4 mm long, 5-angled, the teeth about same length as tube, spine-tipped, the 2 lower teeth bent backward.
Nutlets, 4 clustered together, three-angled, squared-off and bristly-hairy at tips.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Dry to moist waste places in the steppe zone; rare in SC BC; introduced from Eurasia.

Source: The Illustrated Flora of British Columbia


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References