Euphorbia palmeri
A perennial in which the petaloid appendages are crenate, with small, somewhat inconspicuous horns at each end.
Plant habit on the east ridge of Sugarloaf Mountain, San Bernardino Mountains, California, 30 May 2009.
Cyathia, east ridge of Sugarloaf Mountain, 30 May 2009.
Closer view of a cyathium, Sugarloaf Mountain, 30 May 2009.