Allium nevii |
Allium unifolium |
|
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Nevius' garlic, Nevius' onion |
American garlic, one-leaf onion |
|
Bulbs | 1–5+, not clustered on stout, primary rhizome, ovoid, 1–2 × 1–2 cm; outer coats enclosing 1 or more bulbs, light brown, membranous, ± reticulate, cells quadrate to polygonal, vertically oblong, without fibers; inner coats white or pink, cells obscure, quadrate. |
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, 1–2 × 0.8–1.5 cm; outer coats not enclosing bulbs, pale brown, delicately cellular-reticulate, membranous, cells ± rectangular, without fibers; inner coats white, cells obscure, ± transversely elongate, contorted. |
Leaves | usually persistent, withering from tip at anthesis, 2, basally sheathing, sheaths not extending much above soil surface; blade solid, flat or ± channeled, falcate, 12–25 cm × 2–3 mm, margins entire. |
persistent, green or withering from tip at anthesis, 2–3, basally sheathing, sheaths not extending much above soil surface; blade solid, flattened, sometimes carinate abaxially, ± falcate, 18–50 cm × 4–10 mm, margins entire. |
Scape | persistent, 1–3, erect, solid, terete or somewhat flattened, 2-edged, not expanded proximal to inflorescence, 15–30 cm × 1–3 mm. |
persistent, solitary, erect, solid, terete, 20–80 cm × 2–7 mm. |
Umbel | persistent, erect, compact, 10–30-flowered, hemispheric, bulbils unknown; spathe bracts persistent, 2, 5–6-veined, ovate, ± equal, apex acute. |
persistent, erect, loose, 15–35-flowered, hemispheric, bulbils unknown; spathe bracts persistent, 2, 6–8-veined, lance-ovate to broadly ovate, ± equal, apex acuminate. |
Flowers | campanulate to substellate, 6–8 mm; tepals spreading, rose-colored, lanceolate, ± equal, becoming papery in fruit, margins entire, apex acuminate; stamens ± equaling tepals, or exserted; anthers blue-gray; pollen light blue or gray; ovary distinctly crested; processes 6, 2 per lobe, low, rounded, margins entire; style exserted, linear; stigma capitate, unlobed; pedicel 8–12 mm. |
stellate, 11–15 mm; tepals spreading, bright pink or rarely white, obovate to ovate, unequal, becoming papery and connivent over capsule, margins entire, apex acute to obtuse or emarginate, inner shorter and narrower than outer; stamens included; anthers yellow or purple; pollen yellow or gray; ovary crestless, 3-grooved, with thickened ridge on either side of groove; style linear, equaling stamens; stigma capitate, scarcely thickened, unlobed or obscurely 3-lobed; pedicel 15–40 mm. |
Seed | coat dull; cells smooth. |
coat dull; cells minutely roughened. |
2n | = 14. |
= 14. |
Allium nevii |
Allium unifolium |
|
Phenology | Flowering May–Jul. | Flowering May–Jun. |
Habitat | Heavy, rocky soils, wet meadows, or along streams | Moist, clay soils, including serpentine, usually along streams |
Elevation | 30–1900 m (100–6200 ft) | 0–1100 m (0–3600 ft) |
Distribution |
OR; WA
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CA; OR
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Discussion | The long, relatively thick rhizomes that develop annually from the bulbs are very characteristic of Allium unifolium and almost unique in North America. Only A. glandulosum Link & Otto and A. rhizomatum Wooton & Standley have similar rhizomes, but these species are not closely related to A. unifolium. Allium unifolium is known only from the Coast Ranges. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 26, p. 267. | FNA vol. 26, p. 258. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | A. douglasii var. nevii | A. grandisceptrum, A. unifolium var. lacteum |
Name authority | S. Watson: Proc. Amer. Acad. Arts 14: 231. (1879) | Kellogg: Proc. Calif. Acad. Sci. 2: 112, fig. 35. (1863) |
Web links |