Calochortus coeruleus

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Calochortus coeruleus
Calochortus coeruleus - Flickr. 003.jpg
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Monocots
Order: Liliales
Family: Liliaceae
Genus: Calochortus
Species: C. coeruleus
Binomial name
Calochortus coeruleus[1][2][3][4]
(Kellogg) S. Wats.
  • Calochortus caeruleus common misspelling[5][6]
  • Cyclobothra coerulea Kellogg[7]
  • Cyclobothra elegans Torr.[8][9]
  • Calochortus maweanus Leichtlin ex Baker
  • Cyclobothra maweama (Leichtlin ex Baker) Tubergen
  • Calochortus coeruleus var. maweanus (Leichtlin ex Baker) Jeps.
  • Calochortus coeruleus var. fimbriatus Ownbey

Calochortus coeruleus,[2][3][4] often misspelled as Calochortus caeruleus,[5] is a bulbous plant of the lily family. It is known by the common name beavertail grass or blue star tulip.[11]


The plant is endemic to California. It is found only in the North California Coast Ranges, Southern Cascade Range, and Northern Sierra Nevada.[12]

Calochortus coeruleus is a distinctive plant bearing flowers with light blue spade-shaped petals covered in brushlike hairs.[12]


The botanical name Calochortus caeruleus is not accepted, being an orthographic variant (misspelling) of Calochortus coeruleus.[1][5] Watson in coining the name in 1875 spelled it "caeruleus" but he also cited Kellogg's 1863 name Cyclobothra coerulea as basionym.[6][7]


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