Ferocactus chrysacanthus

Ferocactus chrysacanthus  is a golden spined (chrysa=golden;canthus=spined) barrel cactus that sometimes occurs with red spines.  The flowers are typically yellow, although the color can range to orange.  The plant is very densely spined and because of that, will tolerate full sun here in Tucson.  (That's 11,000+ foot candles-great for densely spined cacti, but the second highest incidence of skin cancer in the world!) 

F. chrysacanthus only occurs naturally on the island of Cedros, off the west coast of northern Baja California and possibly on a neighboring island, West San Benitos, with some reports of it on the adjacent peninsula.

This is somewhat of a slow growing species.  The plant pictured above is about 15 years old and about ten inches in diameter, although it has been flowering for several years.  The seeds germinate readily..  Plants several years old are cold tolerant to at least the mid-twenties F.
Because of its beautiful golden spines and its smaller stature, F. chrysacanthus makes a great collector's plant.