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FNA | Family List | FNA Vol. 26 | Liliaceae | Calochortus

14. Calochortus umbellatus Alph. Wood, Proc. Acad. Nat. Sci. Philadelphia. 20: 168. 1868.

Oakland star-tulip

Stems usually branching, 8–25 cm, not bearing bulblets. Leaves: basal persistent, 2–4 dm; blade lanceolate, flat; cauline usually present. Inflorescences subum-bellate, 3–12-flowered. Flowers ± erect; perianth open, campanulate; sepals 10–14 mm; petals white to pale pink, usually with purple blotch near gland, widely obovate to cuneate, 12–18 mm, adaxial surface not ciliate, ± glabrous, margins irregularly dentate distally; glands basally convex, covered by broad, ciliate membrane, bordered distally by short hairs; filaments longer than anthers; anthers oblong, apex acute or obtuse. Capsules nodding, 3-winged, 1–2 cm. Seeds dark brown, irregular. 2n = 20.

Flowering early spring--early summer. Openings in chaparral or woods, often on serpentine; 100--700 m; Calif.

Calochortus umbellatus grows around San Francisco Bay. It is reported also from Lake County.


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