Family:
Cactaceae
Subfamily:
Cactoideae
Name:
Echinocactus polycephalus Engelmann & Bigelow Proc. Amer. Acad. 3: 276 (1856)
Alt. Name:
Basionym:
Synonyms:
Emorycactus polycephalus (Engelmann & Bigelow) Doweld Succulenta 75 (5): 270 (1996)
Homalocephala polycephala (Englem. & J.M. Bigelow) Vargas & Bárcenas, PhytoKeys 111: 31-59 (2018)
Type:
Lectotype: J. M. Bigelow s. n. 1854.3.8. No. 2017480 (MO) designated by Michael Chamberland Syst. Bot. 22: 311 (1997)
Syntype: J. M. Bigelow s. n. 1854 March No. 201779 (MO)
Type Locality:
California, Mohave Valley
Distribution:
USA: California; Lower Colorado River Valley, Mohave Desert; south western Arizona; Mexico; northern Sonora
Altitude:
30 – 1700m
Collection No:
SB1294, 1818
Flowering:
Extra Info:
Especially the great difference in the seed characters separates this taxon as a good species from Echinocactus xeranthemoides. A name for the yellow – spined form is Echinocactus polycephalus f. flavispinus (Haage ex Quehl) Benson Cact. US. Can.: 951 (1982), but no type specimen is preserved.
Compiler:
Unger, Gottfried / at / 2018.3.17.
