Allium macrum explained

Allium macrum, the rock onion, is an American species of wild onion native to the eastern and central parts of the US States of Oregon and Washington. It grows on gravelly soils at elevations up to 1400 m.^{[1] [2]} It is a perennial herb.^[3]

Allium macrum produces round to egg-shaped bulbs up to 2 cm long. Flowers are white to pale pink with a green stripe running the length of each tepal. Anthers and pollen are yellow.^{[1] [4] [5] [6]}

Notes and References

1. http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=242101372 Flora of North America v 26 p 267, Allium macrum
2. http://bonap.net/MapGallery/County/Allium%20macrum.png BONAP (Biota of North America Program) floristic synthesis, Allium macrum
3. Web site: Lady Bird Johnson Wildflower Center - The University of Texas at Austin. www.wildflower.org.
4. 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.
5. https://www.biodiversitylibrary.org/page/8714526#page/243/mode/1up Watson, Sereno. 1879. Proceedings of the American Academy of Arts and Sciences 14: 233.
6. https://www.biodiversitylibrary.org/page/34807285#page/51/mode/1up St. John, Harold. 1931. Proceedings of the Biological Society of Washington 44(10): 31–32.