plant with nearly leafless stalk topped by a cluster of red or reddish lavender flowers; California to Oregon

plant with nearly leafless stalk topped by a cluster of red or reddish lavender flowers; California to Oregon

prostrate or semi-erect subshrub of tropical America, and Australia; heavily armed with recurved thorns and having sensitive soft grey-green leaflets that fold and droop at night or when touched or cooled

prostrate or semi-erect subshrub of tropical America, and Australia; heavily armed with recurved thorns and having sensitive soft grey-green leaflets that fold and droop at night or when touched or cooled