Allium madidum |
Allium jepsonii |
|
---|---|---|
mountain swamp onion, swamp onion |
Jepson's onion |
|
Bulbs | 1–3, larger bulbs each usually with cluster of 10–30 easily detached bulbels to one side of base, not clustered on stout, primary rhizome, globose to ovoid, 1–1.6 × 0.8–1.5 cm; outer coats enclosing 1 or more bulbs, brownish, membranous, without fibers; inner coats white to pink; inner and outer coats frequently without obvious reticulations, these, when present, contorted. |
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 | persistent, green at anthesis, 2, basally sheathing, sheaths not extending much above soil surface; blade solid, flat or channeled, 10–25 cm × 1–4 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, solid, ± terete, sometimes ridged, 10–20 cm × 1–2 mm. |
persistent, solitary, erect, solid, terete, 25–37 cm × 1–3 mm. |
Umbel | persistent, erect, compact, 10–20-flowered, hemispheric, bulbils unknown; spathe bracts persistent, 2, 5–7-veined, ovate, ± equal, 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 | campanulate, 6–10 mm; tepals erect or ± spreading, white with prominent green or pink midveins, lanceolate, ± equal, becoming papery in fruit, margins entire, apex obtuse to acuminate, becoming involute at tip; stamens included; anthers white or yellow; pollen yellow; ovary crestless or obscurely crested; processes 3, low, central, rounded, minute; style linear, equaling stamens; stigma capitate, unlobed or slightly lobed; pedicel 5–12 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 dull; cells ± smooth. |
coat dull or shining; cells minutely roughened. |
2n | = 28, 42. |
= 14. |
Allium madidum |
Allium jepsonii |
|
Phenology | Flowering May–Jul. | Flowering late May–early Jul. |
Habitat | Seasonally wet meadows | Clay soils, including serpentine |
Elevation | 1100–2000 m (3600–6600 ft) | 300–600 m (1000–2000 ft) |
Distribution |
ID; OR
|
CA |
Discussion | Allium madidum is found in the Blue Mountains, Oregon and in Idaho near Payette Lake and New Meadows. (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. 255. | FNA vol. 26. |
Parent taxa | Liliaceae > Allium | Liliaceae > Allium |
Sibling taxa | ||
Synonyms | A. sanbornii var. jepsonii | |
Name authority | S. Watson: Proc. Amer. Acad. Arts 14: 228. (1879) | (Ownbey & Aase ex Traub) S. S. Denison & McNeal: Madroño 36: 127. (1989) |
Web links |