(Valeriana columbiana)
Inflorescence compact, terminal, 3-6 cm. wide; calyx enlarging and spreading, with 11-16 plumose, bristle-like segments; flowers all perfect; corolla united, white, 11-18 mm. long, the 5 lobes about as long as the tube; stamens 3, equaling the corolla lobes; ovary inferior, with two of the three cells vestigial.