Streptanthus albidus 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 may be white to purple, depending on subspecies. The fruit is a long, narrow silique which may be 12 centimeters in length. There are two subspecies, both rare. Streptanthus albidus Streptanthus albidus is a species of flowering plant in the mustard family known by the common name Metcalf Canyon jewelflower. It is endemic to California, where
Calyx (anatomy) Calyx (anatomy) Calyx is a term used in animal anatomy for some cuplike areas or structures. Latin, from "calyx" (from Ancient Greek "κάλυξ, "case of a bud, husk"). The spicules containing the basal portion of the upper tentacular part of the polyp of some soft corals (also called "calice"). A body part of the Entoprocta from which tentacles arise and the mouth and anus are located. The body disk that is covered with a leathery tegumen containing calcareous plates (in crinoids and ophiuroids the main part of the body where the viscera are located). Either a minor calyx in the