Asperula lutea subsp. lutea

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 : 8

(a) Subsp. lutea :

Stems 12-30 cm. Leaves somewhat falcate, with more or less dense, patent hairs up to 0.3 mm, or glabrous, with awn up to 1 mm; midrib comprising less than 3/ 4of width of leaf; margin more or less weakly revolute. Inflorescence usually unbranched. Corolla 3.5- mm, yellowish to reddish, glabrous, rarely with sparse, short hairs. Fruit c. 2 mm, papillose, glabrous. Montane to subalpine zones. S. C.Greece.