Allium tuberosum |
Allium jepsonii |
|
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Chinese chive, garlic chives, oriental garlic |
Jepson's onion |
|
Bulbs | 1–3, borne on stout, ± horizontal rhizome, elongate, cylindric or conic, 0.5–1.5 × 0.7–2 cm; outer coats enclosing 1 or more bulbs, brown, reticulate, cells ± fine-meshed, open, fibrous; inner coats white, cells closely parallel, elongate. |
1–2, not clustered on stout, primary rhizome, ovoid to subglobose, 1.5–2.5 × 1–2 cm; outer coats enclosing single bulb, gray-brown, membranous, lacking cellular reticulation or cells arranged in only 2–3 rows distal to roots, ± quadrate, without fibers; inner coats light brown or white, cells obscure, quadrate. |
Leaves | withering from tip by anthesis, 2–5, sheathing scape to ± soil level; blade solid, flat, carinate abaxially, 20–40 cm × 2–6 mm, margins entire. |
persistent, withering from tip by anthesis, 1, basally sheathing, sheath not extending much above soil surface; blade solid, terete, 22–42 cm × 1–4 mm. |
Scape | persistent, solitary, erect, terete, 30–50 cm × 1–3 mm. |
persistent, solitary, erect, solid, terete, 25–37 cm × 1–3 mm. |
Umbel | persistent, erect, loose, 20–50-flowered, hemispheric-globose, bulbils unknown; spathe bracts persistent, 1–3, 3–7-veined, lance-ovate, shorter than pedicel, apex acuminate. |
persistent, erect, ± compact, 20–60-flowered, hemispheric, bulbils unknown; spathe bracts persistent, 3–4, 4–5-veined, ovate, ± equal, apex long-acuminate. |
Flowers | substellate, 4–9 mm; tepals spreading, white with green or brownish midveins, lanceolate to elliptic, ± equal, withering and exposing capsule, margins entire, apex obtuse or acute; stamens included; anthers purple; pollen white; ovary crestless; style linear, ± equaling stamens; stigma capitate, unlobed; pedicel 10–30 mm. |
campanulate, 7–8.5 mm; tepals erect, white, flushed with pink near dark pink midveins, ovate-elliptic, ± equal, becoming papery in fruit, margins erose, apex acute to apiculate, outer tepals with reflexed tips; stamens included; anthers yellow; pollen yellow; ovary crested; processes 6, prominent, ± triangular, margins erose; style linear, equaling stamens; stigma capitate, 3-lobed, lobes slender, recurved; pedicel 7–20 mm. |
Seed | coat shining; cells smooth, irregularly shaped, with ± sinuous walls. |
coat dull or shining; cells minutely roughened. |
2n | = 14. |
|
Allium tuberosum |
Allium jepsonii |
|
Phenology | Flowering Jul–Aug. | Flowering late May–early Jul. |
Habitat | Roadsides and other disturbed ground | Clay soils, including serpentine |
Elevation | 300–600 m (1000–2000 ft) | |
Distribution |
IA; NE; WI; se Asia [Introduced in North America]
|
CA |
Discussion | Allium tuberosum is cultivated in China, Siberia, and North America, and is reported to be established in New England. It may escape anywhere the species is cultivated. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Allium jepsonii is disjunct in the foothills of the Sierra Nevada. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 26, p. 240. | FNA vol. 26. |
Parent taxa | Liliaceae > Allium | Liliaceae > Allium |
Sibling taxa | ||
Synonyms | A. sanbornii var. jepsonii | |
Name authority | Rottler ex Sprengel: Syst. Veg. 2: 38. (1825) | (Ownbey & Aase ex Traub) S. S. Denison & McNeal: Madroño 36: 127. (1989) |
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