Allium geyeri |
Allium bisceptrum |
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Geyer's onion |
twincrest 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. |
1–7+, commonly producing either a cluster of stalked; basal bulbils or filiform rhizomes to 10 cm, terminated by bulbils; rhizomes usually lost when specimens are collected; ovoid; outer coats enclosing 1 or more bulbs, membranous, obscurely cellular-reticulate; cells rectangular; walls minutely sinuous; vertical, varying to irregular; all sinuous; 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 at anthesis, 2–5; blades solid; flat, broadly channeled, 8–30 cm × 1–13 mm. |
Scapes | persistent; solitary; erect; terete or somewhat 2-angled, 10–50 cm × 1–3 mm. |
persistent; solitary or clustered, 1–3; erect; solid; terete, 10–30(40) cm × 1–5 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, 15–40-flowered, globose; pedicels 10–20 mm, often becoming flexuous and deflexed in fruit; 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. |
7–10 mm; tepals spreading, lanceolate; more or less equal; lilac to white, becoming papery in fruit, not keeled; margins entire; apex acuminate, not involute; stamens included; ovary conspicuously crested with 6 triangular processes; stigma unlobed. |
2n | =14, 28. |
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Allium geyeri |
Allium bisceptrum |
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Distribution | ||
Discussion | 2 varieties. |
Meadows and aspen groves, less commonly on open slopes in mountains, grasslands with juniper, pumice barrens. Flowering Jun–Jul. 1400–2000 m. BW, ECas, Owy. CA, ID, NV; southeast to NM. Native. |
Source | Flora of Oregon, volume 1, page 139 Nick Otting, Richard Brainerd, Barbara Wilson |
Flora of Oregon, volume 1, page 136 Nick Otting, Richard Brainerd, Barbara Wilson |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | Allium bisceptrum var. bisceptrum | |
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