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FNA | Family List | FNA Vol. 21 | Asteraceae | Raillardella

2. Raillardella argentea (A. Gray) A. Gray in W. H. Brewer et al., Bot. California. 1: 417. 1876.

Railliardia argentea A. Gray, Proc. Amer. Acad. Arts 6: 550. 1865 (as Raillardia)

Plants 1–15 cm. Leaf blades ob-lanceolate, margins entire or toothed, faces sericeous (silvery), sometimes sparsely stipitate-glandular as well. Ray florets 0. Disc florets 7–26; corollas yellow, 6–11 mm. 2n = 34, 36.

Flowering Jul–Sep. Dry, exposed, often gravelly sites; 1800–3900 m; Calif., Nev., Oreg.

Raillardella argentea occurs widely in the Sierra Nevada and southern Cascade Range and locally in the Klamath Ranges, San Bernardino Mountains (Mt. San Gorgonio), and western ranges of the Great Basin. Artificial hybrids with R. pringlei are completely fertile and vigorous (D. W. Kyhos et al. 1990); the two species are not known to co-occur in nature.


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