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Wood betony

Also known as: Lousewort

Pedicularis canadensis L.

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Wood betony fruiting
Wood betony inflorescence
Wood betony
Wood betony leaves
Wood betony
Wood betony leaf
Wood betony
Wood betony
Wood betony
Wood betony fruiting habit

Morphology

Stem
Erect, simple, few to several in clump, sparsely soft-hairy.
Leaves
Mostly basal, leaves of main stem alternate; lanceolate to narrowly oblong, 1.6 to 6 inches long, 1/3 to 1 inch wide, pinnately-cleft, fern-like in appearance; segments oblong to ovate, scalloped; lower leaves on stalks often longer than blade; upper leaves progressively reduced, short-stalked to nearly sessile.
Inflorescence
Spike, solitary, dense, 1.2 to 2 inches in flower, to 8 inches in fruit; bracts leaf-like, oblanceolate, scalloped to toothed.
Flower
Calyces about 1/3 inch long; lobes 2, short, united behind, separated by short cleft above and deeper cleft below; corolla strongly 2-lipped, 3/4 to 1 inch long, pale yellow, sometimes tinged purplish or reddish, rarely completely purple; upper lip helmet-shaped, 1/2 to 3/5 inch long, 2 slender teeth just below tip; lower lip 3-lobed, 1/4 to 2/5 inch long; lobes widely spreading, lateral 2 rounded, longer than mid-lobe; stamens 4, arranged in 2 sets.
Fruit
Capsule, asymmetrical, lance-oblong, 2/5 to 3/5 inch long, tip scarcely beaked; seeds numerous.

Ecology

Habitat
Moist open prairies, upland woods, and slopes bordering streams; sandy and acidic soils.
Distribution
East 1/4 of Kansas.

Practical Information

Toxicity
Thought by some to be posinous to sheep. However, no cases of toxicity have been recorded in livestock.
Uses
Native Americans cooked the stems and leaves for food and mixed the roots with oats to fatten their horses. Medicinally, an infusion of the roots was taken for stomach and heart disorders and sore throats. It was also rubbed on sores. A poultice of roots was applied to tumors and finely chopped root was added to food as a love charm. The plant was placed in dog beds under the belief that it would delouse the dogs.

Additional Notes

Comments

The name comes from Latin pediculus, "louse", alluding to the superstition that livestock who ate the plant would become invested with lice. Some believed that the plant bred lice. The seeds resembled lice and the scalloped leaves had the appearance of being invested by lice. In the past, it was used to keep lice away. Wood betony is partially parasitic on the roots of other plants. The pollen is protected from precipitation by the hood-like upper lip.

Quick Facts
Plant Type
Wildflower
Family
Orobanchaceae - Broomrape Family
Life Span
Perennial
Height
4-16 inches
Last Updated
2025-02-15
Color Groups
Yellow Wildflowers
Flowering Period
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Blooms: April, May, June