Allium geyeri |
Allium unifolium |
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Geyer's onion |
one-leaf onion |
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Bulbs | 2–10+; ovoid or slightly elongate; outer coats enclosing 1 or more bulbs, reticulate; cells rather coarse-meshed; open, fibrous. |
solitary, replaced annually by new bulbs borne terminally on secondary rhizome; rhizomes 1–3, conspicuous; to 5 cm; smooth, parent bulbs disappearing by anthesis except for still-functional roots and bulb coat; ovoid to oblique-ovoid; outer coats not enclosing bulbs, delicately cellular-reticulate, membranous; cells more or less rectangular; without fibers. |
Leaves | persistent, usually green at anthesis, usually 3–5; blades solid; more or less straight; flat, channeled; (6)12– 30 cm × 1–3(5) mm. |
persistent, green or withering from tip at anthesis, 2–3; blades solid, flattened, sometimes carinate, keeled dorsally; more or less falcate, 18–50 cm × 4–10 mm; margins entire. |
Scapes | persistent; solitary; erect; terete or somewhat 2-angled, 10–50 cm × 1–3 mm. |
persistent; solitary; erect; solid; terete, 20–80 cm × 2–7 mm. |
Umbels | persistent; erect; compact, 10–25-flowered, hemispheric to globose, not producing bulbils, or 0–5-flowered, largely replaced by ovoid, acuminate bulbils; pedicels becoming rigid and stiffly spreading in fruit, 8–13 mm; spathe bracts 2–3. |
persistent; erect; loose, 15–35-flowered, hemispheric; pedicels 15–40 mm; spathe bracts 2. |
Flowers | (4)6–8(10) mm; tepals erect or spreading; ovate to lanceolate; more or less equal, pink to white; margins often obscurely toothed; apex obtuse to acuminate; stamens included; ovary when present, inconspicuously crested with 3–6 low processes; stigma unlobed or obscurely lobed. |
11–15 mm; tepals spreading, obovate to ovate, unequal, bright pink or rarely white; apex acute to obtuse or emarginate; inner shorter and narrower than outer; stamens included; ovary crestless; stigma scarcely thickened, unlobed or obscurely 3-lobed. |
2n | =14. |
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Allium geyeri |
Allium unifolium |
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Distribution | ||
Discussion | 2 varieties. |
Wet clay soil, usually along streams, sometimes on serpentine. Flowering May–Jun. 50–100 m. Est. CA. Native? Because of its large, attractive inflorescence, A. unifolium has entered the bulb trade and is widely cultivated. Our Curry County population may be native, but others are likely introduced. This species is unique in our flora in producing long, thick rhizomes each year. |
Source | Flora of Oregon, volume 1, page 139 Nick Otting, Richard Brainerd, Barbara Wilson |
Flora of Oregon, volume 1, page 144 Nick Otting, Richard Brainerd, Barbara Wilson |
Sibling taxa | ||
Subordinate taxa | ||
Web links |
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