Robust Starwort

Description

Pseudostellaria oxyphylla, the robust starwort or Robinson's starwort, is a rare plant species endemic to Idaho, known only from Kootenai and Shoshone Counties. It grows along streambanks in conifer forests at elevations of 800-900 m. Pseudostellaria oxyphylla is an annual herb with fibrous roots. Stems are 4-angled, up to 30 cm long, with a thin line of hairs along one side. Leaves are narrow, up to 12 cm long. Flowers have green sepals and white petals.