Galium saxosum, (Chaix) Breistr.

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 : 29

80. G. saxosum (Chaix) Breistr. , Procès-Verb. Mens. Soc. Dauph. Ethnol. Archéol. 24(182-184): Séance 25 fév. 1948 (sine pag.) (1948)

( Asperula saxosa Chaix , Galium villarsii Req. ).

Laxly caespitose. Stems 5-15 cm, lax, 4-angled, glabrous. Leaves 5-12 x 1-1-5 mm, in whorls of 5-6, lanceolate to linear, with a short, cartilaginous apiculum, rather thick, flat, black when dry, glabrous and smooth. Inflorescence ovoid, with small, denseflowered partial inflorescences; pedicels 0-5-1 mm. Corolla 2-2-2 mm, broadly cup-shaped, white, glabrous; tube 0-5-0-6 mm; lobes 1-5 mm, triangular, slightly longer than wide. Filaments c. 0-5 mm; anthers c. 0-5 mm. Fruit 2-2-7 mm, glabrous, smooth. 2« = 22. Calcareous screes. • S.W. & S.C. Alps. Ga It.