Blue Fountain Bush is a shrubs 1-4 m tall. Leaves opposite or in threes; petiole to 5 cm or leaf subsessile; leaf blade oblong, obovate-oblong, elliptic, or ovate, 6-30 2.5-11 cm, papery, pubescent, margin subentire to serrulate or sparsely coarse serrate, apex acuminate to acute; veins 10 or 11 pairs, abaxially prominent. Inflorescences are terminal thyrses, densely yellow-brown hairy. Bracts are sessile, ovate to broadly ovate, 1.5-4.5 0.5-1.8 cm. Flowers white, bluish, or purplish, tube 7 mm. Petals oblong to obovate, 6-12 mm. Stamens 2-4 cm long, protruding out. Style long protruding. Drupes green when young, becoming black, spherical.