Encelia actoni


Bot. Gaz. 39: 47. 1905.

Synonyms: Encelia frutescens var. actoni (Elmer) S. F. Blake Encelia virginensis subsp. actoni (Elmer) D. D. Keck
Treatment appears in FNA Volume 21. Treatment on page 121. Mentioned on page 119.

Shrubs, 50–150 cm. Stems with slender branches from bases, hairy, developing fissured barks. Leaves cauline; petioles 6–12 mm; blades silvery green, ovate to deltate, 25–40 mm, apices acute, faces ± silvery-canescent. Heads borne singly. Peduncles canescent. Involucres 8–14 mm. Phyllaries ovate. Ray florets 14–25; corolla laminae 10–25 mm. Disc corollas yellow, 5–6 mm. Cypselae 5–7 mm; pappi usually 0, rarely of 1–2 bristlelike awns. 2n = 36.

Phenology: Flowering Feb–Jul.
Habitat: Open areas, rocky slopes, roadsides
Elevation: 800–1500 m



Calif., Nev., Mexico (Baja California).


The epithet actoni (sometimes spelled actonii) is from a place name (Acton, Los Angeles County, California); actoni is correct.

Selected References


Lower Taxa