seedling showing leaves in early spring, and a few pale yellow flowers. REd spines eventually turn grey, but tend to be retained in this form, and longer than other forms of E horrida
hmmm... sure doesn't look that spiny. Not sure what to say, but there's the sign in the Huntington collection.
Euphorbia horrida, late August, South Africa
CACSS Plant Show, April 1, 2011, Phoenix, Arizona, zone 9a/9b
nursery planting in southern California