Photo: Castela emoryi 4.

Closeup of butchered branch. This is -not- how you pick the plant. Pipeline road, AZ, US. Wild. 1998-03-01.

Castela emoryi (Gray) Moran & Felger
Engl.: crucifixion thorn, cascara amarga, chaparro amargosa.
Span.: corona de cristo.
Bot. syn.: Holacantha emoryi Gray