Androstephium is a genus with only two species which are native to central and western areas of the continental U.S. This genus is now considered to be another member in the family, Themidaceae (or Asparagaceae depending on your authority), which includes the California genera Bloomeria, Brodiaea, Dichelostemma, Dipterostemon, Muilla, and Triteleia, and is in the Androstephium-Muilla clade within this family. Both species produce corms with fibrous-reticulated tunics. The flowers in spring are whitish or bluish with six stamens united into a narrow funnel giving rise to the common names of Pink Funnel Flower and Blue Funnel Flower.
Androstephium breviflorum S.Watson is native from eastern California to western Colorado. It has pale purplish to whitish flowers, often called Pink Funnel Flower. The five photos below were taken 27 March 2010 by Dylan Hannon in habitat (a few plants were dug up as vouchers and pressed flat and dried for research reference).
Androstephium coeruleum (Scheele) Greene is native to prairies from South Dakota to central Texas. It has few-flowered fragrant umbels of bluish, lavender, or white flowers on short stems in early spring, often called Blue Funnel Flower. The scent is said to be like chocolate candy. It does well in sunny raised beds in alkaline soil. Photo from iNaturalist taken by 3 Rivers Foundation in March in Texas and shared under a CC BY-NC license.