Solidago sempervirens, L.

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 : 110

2. S. sempervirens L. , Sp. Pl. 878 (1753).

Stems 30-200 cm, arising from a short stock. Leaves somewhat fleshy, entire, obtuse, apiculate; basal 10-30x2-6 cm, elliptic-lanceolate to ovate, with wide petioles; cauline 10-35, largest in the middle of the stem, linear-lanceolate to ovate, sessile, more or less amplexicaul; margins smooth, rarely very minutely scabrid. Panicle thyrsoid or the lower branches patent with more or less secund capitula, glabrous. Involucre 3-5 mm. Ligules 7-11, 3-5 mm. Tubular florets 12-40; corolla 4-5-5 mm. Achenes 2-2-3-5 mm, sparsely pubescent; pappus 3-5-5-5 mm. Açores. *Az. (E. North America.)

The description applies to the plants from the Açores, which appear to be referable to var. sempervirens , although the basal leaves are often wider and the capitula smaller than in the American plants; they have been called var. azorica (Höchst.) St John.