Calochortus howellii

{{Short description|Species of flowering plant}}

{{Speciesbox

|image = Calochortus howellii (Howell's mariposa lily) (33171541356).jpg

|genus = Calochortus

|species = howellii

|authority = S.Wats.

}}

Calochortus howellii, or Howell's mariposa lily, is a rare North American species of flowering plants in the lily family, found only in Josephine and Curry Counties in south-western Oregon.Gerritsen, M.E. & Parsons, R. (2007). Calochortus: Mariposa lilies & their relatives: 1-232. Timber press, Inc. Portland, U.S.A.[http://apps.kew.org/wcsp/acceptedRef.do?name_id=301702 Kew World Checklist of Selected Plant Families][https://www.biodiversitylibrary.org/page/3105936#page/294/mode/1up Watson, Sereno 1888. Proceedings of the American Academy of Arts and Sciences 23(2): 266–267][http://bonap.net/MapGallery/County/Calochortus%20howellii.png Biota of North America Program 2014 county distribution map]

Calochortus howellii is a bulb-forming perennial with straight stems up to 40 cm tall. Petals are white or pale yellow with purple hairs on the petals.[http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=242101471 Flora of North America, Vol. 26 Page 129 Calochortus howellii S. Watson] It grows on serpentine outcrops at lower or middle elevations.{{Cite web|title=Calochortus howellii|url=https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.132670/Calochortus_howellii|access-date=|website=explorer.natureserve.org}}