Definition of "cholla"

Throughout Arizona the floors of such caves are found covered with a deep bed of chollas.

1889 January 26, “Archæological camping in Arizona”, in American Architect and Architecture, volume 52, page 43

The cholla was two feet high, and six feet in diameter.

1890 October, “A Series of Eggs of Palmer's Thrasher”, in The Ornithologist and Oölogist, volume 15, page 155

On the front nine, Jones stuck to Woods like a cholla cactus.

2009 February 26, Karen Crouse, “Woods Returns as He Left: A Winner”, in New York Times‎