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

5. Encelia virginensis A. Nelson, Bot. Gaz. 37: 272. 1904.

Encelia frutescens (A. Gray) A. Gray var. virginensis (A. Nelson) S. F. Blake

Shrubs, 50–150 cm. Stems with slender branches from bases, hairy, developing fissured barks. Leaves cauline; petioles 2–7 mm; blades gray-green, narrowly ovate to deltate, 12–25 mm, apices acute or obtuse, faces sparsely canescent and strigose. Heads borne singly. Peduncles canescent. Involucres 9–13 mm. Phyllaries narrowly ovate. Ray florets 11–21; corolla laminae 8–15 mm. Disc corollas yellow, 5–6 mm. Cypselae 5–8 mm; pappi usually 0, rarely of 1–2 bristlelike awns. 2n = 36.

Flowering Apr–Jun, Dec. Desert flats, rocky slopes, roadsides; 500–1500 m; Ariz., Calif., Nev., N.Mex., Utah.

In the mountains of the eastern Mojave Desert in California, Encelia virginensis may intergrade with E. actoni at higher elevations, probably as a result of hybridization. Plants of E. virginensis in New Mexico may be adventive.


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