Solanum amazonium
A purple-flowered, prickly-calyxed species I have seen in the Sierra Madre Occidental, Mexico. Identified by R.W. Spellenberg.
A flower in Barranca de Batopilas along the roadside, Chihuahua, Mexico, 22 Mar 2007.
Cauline leaves in Barranca de Batopilas, 22 Mar 2007.
Plant habit in Barranca de Batopilas, 22 Mar 2007.