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Weed Identification in Nurseries and Landscapes

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Healall - Prunella vulgaris L.
 
Life cycle: Stoloniferous perennial.

Leaves: Opposite, egg- to lance-shaped, 0.75 to 4 inches long with smooth to slightly toothed margins. Leaves are sparsely hairy to smooth with crinkled upper surfaces.

Stems: Prostrate, stoloniferous stems are square in cross-section and capable of rooting at the nodes to form dense patches. Flowering stems may reach up to 2 feet in height.

Flowers and fruit: Flowers have blue-violet to purple petals fused into a two-lipped tube and formed in dense spikes atop erect stems. Large, green to purple bracts are present at each flower. Four brown nutlets are formed at each flower.

Reproduction: Seeds and creeping stems.
 
Healall flower spikes Healall stem Healall plant
Healall flowering spikes. Square stem of healall. Healall plant.
The MSU IPM Program maintains this site as an access point to pest management information at MSU. The IPM Program is administered within the Department of Entomology, fueled by research from the Michigan Agricultural Experiment Station, delivered to citizens through MSU Extension, and proud to be a part of Project GREEEN.
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Updated: 10/16/07