Wahlenbergia Schrad. ex Roth.

Flowers regular, funnel-shaped or rotate. Stamens free Wahlenbergia
Tufted perennial herbs without rhizomes the stems and inflorescences becoming much branched
Style constricted in the region of the pollen collecting hairs either close to the stigmatic branches (when the unopened stigmatic lobes appear almost globular) or c. half-way down (when the upper part of the style is distinctly thicker than the lower part)
Style constricted about half-way down. Corolla campanulate; lobes less than 4 times as long as the tube
Style constricted close to the stigmatic lobes. Corolla ± rotate; lobes more than 4 times as long as the tube