Aquatic and Wetland Vascular Plants of the Northern Great Plains
Campanulaceae - The Bellflower Family
Perennial or biennial herbs with simple, alternate, exstipulate leaves. Flowers
in terminal bracteate racemes or solitary and pedicelled in upper leaf axils,
perfect, 5-merous, regular (Campanula) or irregular (Lobelia);
calyx of 5 more or less equal sepals; corolla white to blue-violet,
funnelform or bilabiate, in the latter case, split open along the upper side
with the anthers protruding through the cleft; stamens 5, separate or
united into a tube around the style; ovary inferior or partly so, 2-
to 5-celled, many-ovuled; hypanthium usually prominent. Fruit
a many-seeded capsule, opening laterally or at the top.