Leaves usually 1, 6–30 cm × 3–15 mm. Scape 15–70 cm, minutely scabrous. Flowers: tepals abruptly spreading at base, distinct, yellow with brown midvein, 5–13 mm; filaments parallel to style, 3–10 mm, dilated bases connate into nectariferous cup, cup with basal filament appendages arising from apex, appendages shallowly to strongly 2-cuspidate at apex, cusps linear; anthers 1.5–3 mm; ovary 2–3 mm; style 6 mm; pedicel 0.5–6.5 cm.
Dry flats, hillsides, often in heavy soil, chaparral, coastal sage scrub, valley grasslands, oak woodlands; at elevations from sea level to 1,700 metres.
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