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Dale W. McNeal, except as specified

Perennial to trees, from membranous bulb, fibrous corm, scaly rhizome, or erect caudex
Stem generally underground
Leaves generally basal, often withering early, alternate, generally ± linear
Inflorescence various, generally bracted
Flower generally bisexual, generally radial; perianth often showy, segments generally 6 in two petal-like whorls (outer sometimes sepal-like), free or fused at base; stamens 6 (or 3 + generally 3 ± petal-like staminodes), filaments sometimes attached to perianth or fused into a tube or crown; ovary superior or inferior, chambers 3, placentas generally axile, style generally 1, stigmas generally 3
Fruit: generally capsule, loculicidal or septicidal (berry or nut)
Genera in family: ± 300 genera, 4600 species: especially ± dry temp and subtropical; many cultivated for ornamental or food; some TOXIC. Here includes genera sometimes treated in Agavaceae, Amaryllidaceae, and other families.


Species in genus: 1 sp
Etymology: (Greek: tooth mouth, from staminodes)


O. hartwegii Torr.

Perennial; corm 2.5–3 cm, ovoid, deep
Stem ± scapose, 12–50 cm, ± curved, generally branched
Leaves mostly basal, 10–30 cm, linear, sheathing; upper reduced
Inflorescence: panicle or raceme; bracts 3–10 mm, linear, scarious; pedicels 3–30 mm, with scarious bractlet above middle
Flower: perianth parts 6, fused below, petal-like, white to yellowish; tube 4–5 mm, strongly veined; lobes ± = tube, spreading (becoming reflexed), 3–5-veined; stamens 6, attached to perianth, filaments 1–2 mm, alternate 6 staminodes 0.5–1 mm, anthers dehiscing by pores at tip; ovary superior, chambers 3, style 4–5 mm, thread-like, stigma slightly 3-lobed
Fruit: capsule, loculicidal
Seed obovoid, brown
Chromosomes: n=10
Ecology: Clay, often serpentine soils
Elevation: < 600 m.
Bioregional distribution: Inner North Coast Ranges, n&c Sierra Nevada Foothills
Horticultural information: SUN, IRR until flowers. open, then DRY: 7, 8, 9, 14, 15, 16, 17.

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