Brickellia microphylla

Brickellia microphylla, known as the littleleaf brickellbush, is a flowering plant species in the daisy family native to western North America.[2][3]

Brickellia microphylla
var microphylla in Nevada
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Asterids
Order:
Asterales
Family:
Asteraceae
Subfamily:
Asteroideae
Tribe:
Eupatorieae
Genus:
Brickellia
Species:
B. microphylla
Binomial name
Brickellia microphylla
Synonyms[1]
  • Brickellia cedrosensis Greene
  • Brickellia grayanae Hieron.
  • Coleosanthus cedrosensis (Greene) Greene
  • Coleosanthus microphyllus (Nutt.) Kuntze
  • Brickellia scabra (A.Gray) A.Nelson ex B.L.Rob., syn of var. scabra

Distribution

The plant is widespread across much of the Western United States and Northwestern Mexico. It is found from California and Baja California east to New Mexico and Colorado, and north to Washington, Idaho, and Wyoming.[4][5]

Brickellia microphylla var. scabra has a more eastern and southern distribution in the species' range, and grades into Brickellia microphylla var. microphylla in southern and central Utah and eastern California.[3]

Description

Brickellia microphylla is a shrub 30 – −70 centimetres (12 – −28 in) in size.[3]

It produces many small, pale yellow flower heads pale yellow, often purple-tinged.[3] They are often clumped together at the ends of branches.[6] The bloom period is July to October.[2]

Varieties

Varieties, which can intergrade, include:[1][6]

  • Brickellia microphylla var. microphylla — Littleleaf brickellbush, native to California, Baja California (México), Arizona, Colorado, Idaho, Nevada, Oregon, Utah, Washington, and Wyoming.[7]
  • Brickellia microphylla var. scabra A.Gray — Rough brickellbush, native to southeastern California, Baja California, Arizona, Colorado, Nevada, New Mexico, Sonora (México), Utah, and Wyoming.[8]
  • Brickellia microphylla var. watsonii — Watson's brickellbush, native to southeastern California, Arizona, Nevada, Utah.[9]

References
  1. The Plant List, Brickellia microphylla (Nutt.) A. Gray
  2. Calflora taxon report, University of California, Brickellia microphylla (Nutt.) A. Gray, little leaved brickellia, littleleaf brickellbush
  3. Jepson Manual eFlora (TJM2) treatment of Brickellia microphylla
  4. Biota of North America Program 2014 county distribution map
  5. Turner, B. L. 1997. The Comps of Mexico: A systematic account of the family Asteraceae, vol. 1 – Eupatorieae. Phytologia Memirs 11: i–iv, 1–272
  6. Flora of North America Brickellia microphylla (Nuttall) A. Gray
  7. Calflora: Brickellia microphylla var. microphylla
  8. Calflora: Brickellia microphylla var. scabra
  9. USDA Plants: Brickellia microphylla var. watsonii


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