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

Heterotheca sessiliflora
Heterotheca sessiliflora subsp. bolanderi
Conservation status
Apparently Secure  (NatureServe)
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Asterales
Family:	Asteraceae
Genus:	Heterotheca
Species:	H. sessiliflora
Binomial name
Heterotheca sessiliflora (Nutt.) Shinners 1951
Synonyms[1]
Synonymy Chrysopsis sessiliflora Nutt. Chrysopsis villosa var. sessiliflora (Nutt.) A. Gray Chrysopsis arenaria Elmer, syn of subsp. bolanderi Chrysopsis bolanderi A.Gray, syn of subsp. bolanderi Heterotheca bolanderi (A.Gray) V.L.Harms, syn of subsp. bolanderi Chrysopsis californica Elmer, syn of subsp. echioides Chrysopsis camphorata Eastw., syn of subsp. echioides Chrysopsis echioides Benth., syn of subsp. echioides Chrysopsis vestita Greene , syn of subsp. echioides Heterotheca camphorata (Eastw.) Semple, syn of subsp. echioides Heterotheca echioides (Benth.) Shinners, syn of subsp. echioides Chrysopsis fastigiata Greene, syn of subsp. fastigiata Haplopappus thiniicola Rzed. & E.Ezcurra, syn of subsp. thiniicola Heterotheca thiniicola B.L.Turner, syn of subsp. thiniicola

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

External links

• Jepson Manual Treatment
• United States Department of Agriculture Plants Profile
• Calphotos Photo gallery, University of California
• Photo of herbarium specimen at Missouri Botanical Garden, collected in Santa Barbara County in 1902, isotype of Chrysopsis californica

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