Hartweg evening primrose

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Hartweg evening primrose flower

Hartweg evening primrose

Hartweg evening primrose

Hartweg evening primrose

Morphology

Stem

Decumbent or slightly ascending, 1 to several, usually branched, nearly glabrous throughout.

Leaves

Alternate, simple, somewhat ascending, linear to oblanceolate or lanceolate, up to 2 inches long, less than 1/2 inch wide, glabrous; margins entire or serrate; tips pointed; stalks mostly absent; stem leaves sometimes have clusters of small leaves in axils.

Inflorescence

Flowers in axils of upper leaves.

Flower

Sepals 4, each without keeled midrib, pale yellow, sometimes fade pinkish or orange; floral tube .5 to 2.5 inches long, lower half tubular ; petals 4, yellow, fading pinkish or purplish; stamens 8, nearly equal; style mostly longer than stamens; stigma flat, 4-sided, shield-shaped.

Fruit

Capsule, cylindrical, .2 to 1.6 inch long, sessile; seeds less than 1/10 inch long.

Ecology

Habitat

Prairie hillsides, valleys, roadsides, and open woods; rocky or gravelly soils.

Distribution

Southern portion of the southwest 1/4 of Kansas.

Practical Information

Uses

The plant was used by the Navajo to treat internal bleeding.

Additional Notes

Synonyms

Alternative scientific names that have been used for this plant.