IUCN threat status:

Not evaluated

Comprehensive Description

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Description and adaptation

Evening Primrose family (Onagraceae). Halfshrub sundrop is a native, perennial, warm-season subshrub, shrub forb/herb which is more upright, bushy, and with numerous branches. Halfshrub sundrop grows into a large clump and up to 18 inches in height. The narrow leaves are 3 ½ inches long and alternate from each other with toothed leaf margins. Each small yellow flower has four petals up to 1 ½ inches across which includes the pistils (female organs) and eight prominent stamens (the male organs). The flowers tube is usually no more than 1 inch long. The flowers open in early morning and close in late afternoon and blooms from March to November. The old flowers can turn orange or pink and the plant leaves may stay green in mild winters.

The mature fruit is a cylindrical capsule shape with small seeds enclosed.

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Public Domain

USDA NRCS James E. “Bud” Smith Plant Materials Center, Knox City, Texas

Source: USDA NRCS PLANTS Database

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