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 not constricted, ± the same diameter throughout once the pollen has been removed