Streptanthus glandulosus subsp. albidus (Greene) Al-Shehbaz, M.S.Mayer & D.W.Taylor

 

Streptanthus glandulosus subsp. albidus is a subspecies of flowering plant in the mustard family known by the common name Metcalf Canyon jewelflower. It is endemic to California, where it is known only from the Central Coast Ranges in the San Francisco Bay Area. It grows in open areas such as grasslands, often on serpentine soils.

Description

It is an annual herb producing an erect, usually branching stem up to a meter tall or slightly taller. There are bristly hairs around the base. The basal leaves are lance-shaped with toothed edges and are borne on winged petioles. Leaves farther up the stem are smaller and narrower, sometimes linear in shape, and toothed or smooth-edged. Flowers occur at intervals along the upper stem. Each has a spherical to urn-shaped calyx of keeled sepals about a centimeter long with curving petals emerging from the tip. The calyx of sepals is white or green-tinged. The fruit is a long, narrow silique which may be 12 centimeters in length.

Distribution

It is federally listed as an endangered species of the United States. It is endemic to Santa Clara County, where it is known from nine recent occurrences in the vicinity of Mount Hamilton.

It can be found in isolated and inaccessible mountains on a variety of soils including rock, gravel, and heavy clay.

Streptanthus glandulosus subsp. albidus - Wikipedia

 

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