ɪts ˈoʊnli spˈiːsiːz ɪz dˈɪptɚɹˌɑːstɛmən kˈæpɪtˌæɾəs, sˈɪnənˌɪm dˈɪtʃɪlˌɑːstɛmə kˌæpɪtˈɑːɾəm, nˈoʊn baɪ ðə kˈɑːmən nˈeɪmz blˈuː dˈɪks, pˈɜːpəlhˌɛd ænd bɹˌoʊdɪˈiə ɔːltˈɜːnətli spˈɛld bɹˈoʊdɪə ænd bɹˈoʊdiə, nˈeɪɾɪv tə ðə wˈɛstɚn juːnˈaɪɾᵻd stˈeɪts pɚtˈɪkjʊlɚli ˌæɹɪzˈoʊnə, kˌælɪfˈoːɹniə, ˈɔːɹɪɡən, jˈuːtɔ, ænd nˈuː mˈɛksɪkˌoʊ ænd nɔːɹθwˈɛst mˈɛksɪkˌoʊ.
Its only species is Dipterostemon capitatus, synonym Dichelostemma capitatum, known by the common names blue dicks, purplehead and brodiaea (alternately spelled brodiea and brodeia), native to the Western United States (particularly Arizona, California, Oregon, Utah, and New Mexico) and northwest Mexico.