Asperula, Griseb.

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1976, Flora Europaea. Volume 4. Plantaginaceae to Compositae (and Rubiaceae), Cambridge University Press : 12

Sect. Glabella Griseb. Perennial herbs, often with rhizomes and subterranean stolons. Leaves in whorls of 4-6(-7), ovate, lanceolate or linear, 1 - or 3-veined, rounded or very shortly acute, with cartilaginous apex. Inflorescence pyramidal to corymbiform; partial inflorescences cymose to capitate, bracteate to involucrate. Corolla 3- to 4-merous, narrowly to broadly infundibuliform, white or yellowish, sometimes tinged with pink, smooth outside, fragrant; tube 1 ^-4 times as long as the acute lobes; anthers and stigma included or exserted. Ovary and fruit ovoid, glabrous, smooth or weakly granulate.