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Automatische Übersetzung:
Drummond's sundrops, Calylophus drummondianus, also known as squarebud sundrops. Sundrops are often confused with evening primroses, Genus Oenothera, but have a doughnut-shaped stigma and 4 raised ridges on flower buds. This species is abundant from KS and CO south to TX NM and a small part of LA. Photo Monahans Sand Hills, Ward Co., TX.