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Aquatic and Wetland Vascular Plants of the Northern Great Plains

Pedicularis L. -- Lousewort


Erect perennials with opposite or alternate pinnatifid leaves and terminal, bracteate spikes or spikelike racemes of yellow flowers. Calyx tubular or campanulate, oblique, obscurely lobed or with 2 prominent lateral lobes; corolla pale yellow, strongly irregular, bilabiate, the upper lip strongly concave or arched, entire, sometimes with a pair of lateral teeth near the tip, lower lip about equal to or shorter than the upper, with 2 longitudinal folds; stamens 4, didynamous, included by the upper lip. Capsule ovate to oblong, laterally flattened, loculicidally dehiscent, splitting only or mainly along the upper side.

Lead Characteristic Go To
1 Calyx entire or nearly so; upper lip of the corolla with 2 lateral teeth near the tip. P. canadensis
1 Calyx with 2 crenate, lateral lobes; upper lip of the corolla entire. P. lanceolata


45. Scrophulariaceae, the Figwort Family
8. Pedicularis L. -- Lousewort
1. Pedicularis canadensis L.
2. Pedicularis lanceolata Michx.


Return to Family -- Scrophulariaceae - The Figwort Family
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