Wahlenbergia Schrad. ex Roth.
Flowers regular, funnel-shaped or rotate. Stamens free Wahlenbergia
Style not constricted, ± the same diameter throughout once the pollen has been removed
At least the lowermost leaves opposite and obovate or oblanceolate, becoming alternate and linear up the stem, 5–70 mm long, usually hirsute, margins typically undulate. Sepals 3–16 mm long. Corolla tube 4–11 mm long; lobes 6–20 mm long. Capsule ellipsoid to globular, 3–10 mm long, glabrous or hirsute. Tufted perennial up to 90 cm high, with few stems from the base and few branches. Widespread. Open forests and grasslands, occasionally in heath. Fl. most of the year Wahlenbergia strictastricta
Lowermost leaves alternate, linear or the lowermost sometimes oblanceolate, 4–80 mm long, glabrous to hirsute, margins typically flat. Sepals up to 6 mm long. Corolla tube 4–9 mm long; lobes 6–13 mm long. Capsule elongated-obconic, 4–9 mm long, glabrous. Tufted perennial up to 80 cm high, with numerous stems from the base. Widespread. Open forests and grasslands and as a roadside weed. Fl. most of the year Wahlenbergia communis