Heterotheca sessiliflora

Heterotheca sessiliflora is a species of flowering plant in the daisy family known by the common name sessileflower false goldenaster. It is native to California, Sonora, and Baja California.[2][3][4]

Heterotheca sessiliflora
ssp. bolanderi

Apparently Secure  (NatureServe)
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Asterids
Order:
Asterales
Family:
Asteraceae
Tribe:
Astereae
Genus:
Heterotheca
Species:
H. sessiliflora
Binomial name
Heterotheca sessiliflora
Synonyms[1]

Heterotheca sessiliflora grows in many types of habitats. It is a perennial herb which is quite variable in appearance, particularly across its four subspecies. It may be a small clumping or mat-forming plant or grow tall stems to heights exceeding a meter. It is coated in small bristles or long woolly hairs and it is glandular, particularly around the inflorescence. The flower head contains long yellowish disc florets and the edge is fringed with yellow ray florets.[5]

Subspecies + varieties[1][2]
  • Heterotheca sessiliflora subsp. bolanderi (A.Gray) Semple San Francisco Bay area + coast of Redwood Country
  • Heterotheca sessiliflora subsp. echioides (Benth.) Semple - from San Diego County to Sonoma County
  • Heterotheca sessiliflora subsp. fastigiata (Greene) Semple - mountains of southern California
  • Heterotheca sessiliflora var. sessiliflora
  • Heterotheca sessiliflora subsp. sessiliflora - from Baja California north as far as Santa Clara County
  • Heterotheca sessiliflora var. thiniicola (Rzed. & C.Ezcurra) G.L.Nesom - Gran Desierto de Alta northwestern Sonora[3][6]

References
  1. The Plant List, Heterotheca sessiliflora (Nutt.) Shinners
  2. Calflora taxon report, University of California, Heterotheca sessiliflora (Nutt.) Shinn., Golden Aster, false goldenaster, sessileflower false goldenaster
  3. Tropicos, Haplopappus thiniicola Rzed. & E. Ezcurra
  4. Tropicos, specimen listing for Heterotheca sessiliflora (Nutt.) Shinners
  5. Flora of North America, Heterotheca sessiliflora (Nuttall) Shinners, 1951. Sessileflower goldenaster
  6. Rzedowski, Jerzy & Ezcurra, Exequiel. 1986. Ciencia Interamericana 26(1–2): 16


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