genista(n = noun.plant) genus genista - chiefly deciduous shrubs or small trees of Mediterranean area and western Asia: broom; Array
is a kind of rosid dicot genus
is a member of papilionoideae, subfamily papilionoideae

   A genus of plants including the common broom of Western Europe. [1913 Webster]

genista, n. any almost leafless shrub of the genus Genista, with a profusion of yellow pea-shaped flowers, e.g. dyer's broom.

Etymology:
L

genista anglica, genista hispanica, genista raetam, genista tinctoria, genus genista