Allium cuthbertii |
Allium rhizomatum |
|
---|---|---|
striped garlic |
spreading wild onion |
|
Bulbs | usually solitary, without basal bulbels, ovoid, 1–1.8 × 1–1.2 cm; outer coats enclosing single bulb, grayish, reticulate, cells fine-meshed, open, fibrous; inner coats whitish, cells vertically elongate, regular. |
solitary, not basally clustered, replaced annually by new bulbs borne terminally on rhizome; rhizomes 1–3, conspicuous, slender, 2–3 cm, scaly; parent bulbs persisting, often not collected, oblique-ovoid, 1–2.5 × 1 cm; outer coats enclosing parent bulbs, grayish, lacking cellular reticulation, membranous, without fibers; inner coats white or hyaline, cells obscure, ± quadrate. |
Leaves | persistent, withering by anthesis, 2, sheathing; blade solid, flat, linear, 12–35 cm × 3–6 mm, margins entire or denticulate. |
persistent, green at anthesis, 2–3, basally sheathing, sheaths not extending much above soil surface; blade solid, flat, not falcate, 20–35 cm × 2–3 mm, margins entire. |
Scape | persistent, solitary, erect, terete or ± 3–4-angled, 20–40 cm × 1–3.5 mm. |
solitary, erect, solid, terete, 20–30 cm × 1–3 mm. |
Umbel | persistent, erect, loose, 10–25-flowered, hemispheric-globose, bulbils unknown; spathe bracts persistent, 2–3, 5–7-veined, lanceolate, ± equal, apex acuminate. |
persistent, erect, loose, 5–15(–22)-flowered, globose to hemispheric, bulbils unknown; spathe bracts persistent, 2, 3-veined, ovate to lance-ovate, ± equal, apex acute. |
Flowers | ± stellate, 7–9 mm; tepals spreading to reflexed, white to pinkish or purple, lanceolate, ± equal, remaining thin and becoming strongly reflexed in fruit, margins entire, apex acute; stamens included; anthers yellow; pollen yellow; ovary conspicuously crested; processes 6, central, irregularly contorted; style linear, equaling stamens; stigma capitate, unlobed or obscurely 3-lobed; pedicel 14–45 mm. |
stellate, 6–9 mm; tepals erect, pink with purplish or pinkish midveins, oblong to lanceolate, slightly carinate basally, ± equal, becoming papery in fruit, margins entire, apex acute to acuminate; stamens included; anthers yellow or pink; pollen yellow or white; ovary crestless, 3-grooved with thickened ridge on either side of groove; style linear, shorter than stamens; stigma capitate, scarcely thickened, unlobed; pedicel 10–20(–50) mm. |
Seed | coat shining; cells each with obscure, central papilla. |
coat shining; cells smooth. |
2n | = 14. |
= 28. |
Allium cuthbertii |
Allium rhizomatum |
|
Phenology | Flowering May–early Jun. | Flowering Jul–Sep. |
Habitat | On granitic “flat-rocks” of Piedmont and in sand on coastal plains | Dry, usually grassy areas |
Elevation | 0–300 m (0–1000 ft) | 1200–2200 m (3900–7200 ft) |
Distribution |
AL; FL; GA; NC; SC
|
AZ; NM; TX; Mexico
|
Discussion | Allium rhizomatum has often been included within the Mexican species A. glandulosum. This reduction is unwarranted. The perianth of A. rhizomatum is pale, with the color mainly confined to the midribs. Additionally, the species can be distinguished by its 3-lobed, apically 3-grooved ovary and lack of sepal glands. Allium glandulosum has a red perianth, an apically rounded ovary, and sepal glands. The nectar produced from these glands does not show in herbarium specimens. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 26, p. 241. | FNA vol. 26. |
Parent taxa | Liliaceae > Allium | Liliaceae > Allium |
Sibling taxa | ||
Name authority | Small: Fl. S.E. U.S., 264, 1328. (1903) | Wooton & Standley: Contr. U.S. Natl. Herb. 16: 114. (1913) |
Web links |