The photo above shows a close-up of the flower of sickle milk-vetch (var. subglaber) as seen along Oregon Highway 206 at the Mountain Viewpoint several miles to the east of the John Day River...........May 28, 2007.
variety brachycodon - Ovary and mature pod glabrous. Calyx 6-8.5 mm long. Banner 13.5-15.5 mm long. Keel 9.5-11.5 mm long. leaflets pubescent on the upper surfaces. Found on the upper reaches of the Deschutes River from about 20 miles NE of Madras, OR south into Jefferson, Crook and Deschutes Counties.
variety curvicarpus - Ovary and mature pod pubescent. Banner 16-20 mm long. Keel 12-15 mm long. Upper surface of leaflets pubescent (See photo below.). Found from the southwestern edge of the Blue Mts. of Oregon south to Klamath Falls, OR and east across Lake County to Malheur and Harney Counties and east into the Snake River Plains of southern Idaho and south to California and Nevada.
variety subglaber - Ovary and mature pod glabrous. Calyx 9-13.5 mm long. Banner 13.9-19.5 mm long. Keel 11.5-14.5 mm long. Leaflets nearly glabrous. Found near the lower reaches of the Deschutes and John Day Rivers of Grant and Wasco Counties south to northern Jefferson County.