Family: Rubiaceae (Madder Family) Genus: Houstonia | Species: caerulea Description: Called bluets, quaker ladies or innocence, this plant has white or pale-blue flowers, with a white or yellow center, roughly 1/2″ wide; leaves only about 1/2″ long, mostly at the base of the plant, but with several pairs of smaller stems with leaves. [perennial] Habitat: