Definition of Petalostemon
: a genus of perennial glandular herbs (family Leguminosae) of the central and western U.S. and Mexico having pinnately compound leaves and pink, purple, or white pealike flowers in close heads or spikes and exhibiting a superficial resemblance to clover — see prairie clover
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Origin and Etymology of petalostemon
New Latin, from petalo- (from Greek petalon leaf) + Greek stēmōn warp, thread
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