Allium geyeri |
Allium cernuum |
|
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Geyer's onion |
nodding onion |
|
Bulbs | 2–10+; ovoid or slightly elongate; outer coats enclosing 1 or more bulbs, reticulate; cells rather coarse-meshed; open, fibrous. |
2–5+, clustered, often short-rhizomatous at base, oblong, elongate; outer coats enclosing 1 or more bulbs, membranous, minutely striate, cellular-reticulate; cells in regular vertical rows, narrowly elongate; fibers persistent; parallel; few. |
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 at anthesis, 3–5; blades solid; flat, channeled to broadly V-shaped in cross section, 10–25 cm × 1–6 mm. |
Scapes | persistent; solitary; erect; terete or somewhat 2-angled, 10–50 cm × 1–3 mm. |
persistent, sometimes 2 or more produced successively from single bulb, usually clustered, nodding; solid; terete or ridged, particularly distally, sometimes flattened and narrowly winged, abruptly recurved near apex, 10–50 cm × 1–3 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, nodding; loose, 8–35-flowered, hemispheric; pedicels 6–25 mm, becoming stouter in fruit, elongating and bending abruptly upward from near point of attachment; 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. |
4–6 mm; tepals more or less erect, elliptic-ovate; more or less equal, pink or white; margins more or less entire; apex more or less obtuse; at least outer tepals strongly incurved; midribs not thickened; stamens exserted; ovary conspicuously crested with 6 triangular processes; stigma scarcely thickened, unlobed. |
2n | =14. |
|
Allium geyeri |
Allium cernuum |
|
Distribution | ||
Discussion | 2 varieties. |
Flowering May–Jul. 0–1400 m. BW, Casc, CR, ECas, Est, WV. ID, WA; north to British Columbia, east to MA, southeast to AZ and Mexico. Native. Allium cernuum is the most widespread native North American onion. |
Source | Flora of Oregon, volume 1, page 139 Nick Otting, Richard Brainerd, Barbara Wilson |
Flora of Oregon, volume 1, page 138 Nick Otting, Richard Brainerd, Barbara Wilson |
Sibling taxa | ||
Subordinate taxa | ||
Web links |
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