Perennial herbs or rarely shrubs, sometimes scapose. Leaves alternate, simple, mostly crenate or dentate, apparently petiolate. Inflorescences terminal racemes, sometimes secund; pedicels basally bracteate. Flowers showy, calyx divided to the base, the 5 lobes alike; corolla yellowish, purplish, often spotted, conspicuously exserted, zygomorphic, campanulate, mostly pubescent; stamens 4, alike, the anthers with 2 similar thecae; style slender, elongate, the stigma 2-lobed. Capsule ovoid to conical, septicidal.
"Cal 5-parted nearly to the base, the segments unequal; cor irregular, tubular to campanulate, 5-lobed; stamens 4, the pollen-sacs divergent; style elongate; stigmas 2, distinct; fr ovoid to globose, primarily septicidal; tall biennial or perennial herbs with alternate lvs and medium-sized to large fls in long, terminal, usually secund racemes. 20, Europe and Mediterranean region."