Encelia actoni

Encelia actoni, also known by the common names Acton brittlebush and Acton encelia, is a species of flowering plant in the daisy family.

Encelia actoni
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Asterids
Order:
Asterales
Family:
Asteraceae
Genus:
Encelia
Species:
E. actoni
Binomial name
Encelia actoni [1]
Elmer
Synonyms

Encelia virginensis var. actonii;[2] Encelia virginensis ssp. actonii [3]

It is sometimes misspelled E. actonii.[4]

Distribution

The plant is native to southern California and neighboring areas of Nevada in the U.S. and Baja California in México. It grows in various types of open habitat, including deserts, chaparral, and grasslands.[5][6]

It is found in the Mojave Desert, Sonoran Deserts, Peninsular Ranges, Transverse Ranges, San Joaquin Valley, and southern Sierra Nevada.[7]

The species was named for the community of Acton in Southern California, located in an ecotone of the Mojave Desert ecoregion and of the montane chaparral and woodlands in the San Gabriel Mountains.

Description
The peduncle is covered with short fine hairs (canescent); the involucre is 8–14 millimetres (0.31–0.55 in).

Encelia actoni is a multi−branched perennial shrub, reaching 1–4 feet (0.30–1.22 m) in height. The branches are lined with oval to roughly triangular leaves a few centimeters long, that are gray-green and woolly in texture.[5]

The inflorescence is a solitary daisylike flower head 1–2 inches (2.5–5.1 cm) in diameter, on a tall, erect peduncle. The head has a center of many yellow disc florets surrounded by up to 25 yellow ray florets. It blooms in the Spring.[8]

The fruit is an achene about half a centimeter long, usually lacking a pappus. It reseeds well.[8]

Cultivation

Encelia actoni is cultivated as an ornamental plant for drought tolerant and wildlife gardens, natural landscaping design, and habitat restoration projects.[9] It needs sun and after the first summer, very limited to no supplemental irrigation.[9]

It is a honey plant, supporting diverse pollinators. The plant has a low fuel load, and so has fire retardant qualities in wildfire zones.[8]

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References
  1. ITIS, accepted name: Encelia actonii − Elmer . accessed 11.11.2014
  2. ITIS, not accepted synonym: E.v. var. actonii
  3. ITIS, not accepted synonym: E.v. ssp. actonii
  4. Flora of North America
  5. "Encelia actoni". in Jepson Flora Project (eds.) Jepson eFlora. Jepson Herbarium; University of California, Berkeley. 2018. Retrieved 2018-07-06.
  6. Sullivan, Steven. K. (2018). "Encelia actoni". Wildflower Search. Retrieved 2018-07-06.
  7. Calflora Database: Encelia actoni (Acton encelia)
  8. S&S Seeds−California Native Seeds: Encelia actoni
  9. Las Pilitas Horticulture Database: Encelia actoni (Mountain bush sunflower)
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