Trachystemon

Perennial rhizomatous herbs, sparsely hispid, with glandular hairs. Leaves alternate, entire to crenulate; basal leaves petiolate; cauline leaves sessile. Inflorescence a terminal panicle; bracts present. Flowers pedicellate; sepals 5, connate, elongating after flowering; corolla regular, 5-lobed, funnel-shaped, purplish-blue, scales in throat in 2 series of 5, lower villous, upper papillose; corolla-lobes contorted; stamens long-exserted from corolla-tube, anthers broad-lanceolate; ovary 4-lobed, 4-celled, style exserted from corolla-tube, stigma 2-lobed. Fruit splitting up into 4 mericarps; mericarps obliquely ovoid, keeled, rugose-reticulate.