hippocrepis

from The Century Dictionary.

• noun A small genus of trailing or shrubby perennials, of the natural order Leguminosœ, with unequally pinnate leaves, umbellate heads of yellow flowers, which have the stamens free from the vexillum and the anthers uniform, and a sessile, many-ovuled ovary with an inflexed style: natives chiefly of Europe, northern Africa, and western Asia; the horseshoe-vetches.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun species of Old World herbs or subshrubs: horseshoe vetch