Calochortus howellii

S. Watson

Proc. Amer. Acad. Arts 23: 266. 1888.

Treatment appears in FNA Volume 26. Treatment on page 129. Mentioned on page 121, 130.

Stems slender, not branching or rarely branching in axil of cauline leaf, straight, 2–4 dm. Leaves: basal persistent, 20–35 cm; blade gradually tapering distally, adaxially pubescent. Inflorescences subumbellate, 1–3-flowered; bracts 2, subopposite, linear to narrowly lanceolate, attenuate, 1–3 cm. Flowers erect; perianth open, campanulate; sepals shorter than petals, ovate-acuminate, glabrous; petals yellowish white, with purplish hairs toward base, broadly obovate, cuneate, inconspicuously fringed laterally, sparingly short-hairy adaxially, apex rounded; glands transversely oblong, slightly depressed, densely covered with short, distally branching hairs, the bases of which unite at lower margin to form inconspicuous, discontinuous membranes; filaments shorter than anthers; anthers oblong-lanceolate, apex acute to short-apiculate. Capsules erect, 3-winged, ellipsoid, ca. 2 cm, base and apex acute. Seeds light-colored, irregular. 2n = 20.

Phenology: Flowering late spring–mid summer.
Habitat: Dry, rocky, serpentine soils
Elevation: 300–500 m


Calochortus howellii is known only from the Illinois River valley, Josephine County.

Selected References


Lower Taxa