Allium madidum explained

Allium madidum, common name mountain swamp onion, is a plant species native to the west-central Idaho (Valley, Adams, and Washington Counties), southern Washington (Walla Walla County) and eastern Oregon. It grows in wet meadows at elevations of 1100–2000 m.^{[1] [2] [3]}

Allium madidum produces 1-3 bulbs with as many as 30 smaller bulbels attached. The full-size bulbs are round to egg-shaped, up to 1.6 cm long. Flowers are bell-shaped, up to 10 mm across; tepals white with green or pink midveins; pollen yellow.^{[1] [4] [5]} Flowers bloom May to July.^[6]

Notes and References

1. http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=242101373 Flora of North America v 26 p 255, Allium madidum
2. http://bonap.net/MapGallery/County/Allium%20madidum.png BONAP (Biota of North America Project), floristic synthesis Allium madidum
3. Web site: Vascular Plant List, Walla Walla County, Don Knoke, 2004, Washington Native Plant Society . 2014-03-14 . https://web.archive.org/web/20140314060102/http://www.wnps.org/cbasin/pdf/plant_lists/WallaWallaCounty.pdf . 2014-03-14 . dead .
4. https://www.biodiversitylibrary.org/page/8714521#page/238/mode/1up Sereno Watson. 1879. Proceedings of the American Academy of Arts and Sciences 14: 228.
5. Hitchcock, C. H., A.J. Cronquist, F. M. Ownbey & J. W. Thompson. 1969. Vascular Cryptogams, Gymnosperms, and Monocotyledons. 1: 1–914. In C. L. Hitchcock Vascular Plants of the Pacific Northwest. University of Washington Press, Seattle.
6. Web site: Lady Bird Johnson Wildflower Center - The University of Texas at Austin. www.wildflower.org.