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Heterotheca oregona is a species of flowering plant in the family Asteraceae known by the common name Oregon false goldenaster. It is native to the west coast of Canada and the United States in British Columbia, Washington, Oregon, and California as far south as Los Angeles County.[2][3][4]

Heterotheca oregona
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. oregona
Binomial name
Heterotheca oregona (Nutt.) Shinners 1951
Synonyms[1]
Ammodia oregona Nutt. 1841 Chrysopsis oregona (Nutt.) A.Gray Chrysopsis rudis (ex Greene) Greene, syn of var., rudis

Description

Heterotheca oregona is found in low-elevation mountain forests and chaparral, often near water. This is a perennial herb which is variable in appearance, with four somewhat indistinct varieties. It reaches a maximum height of 20 centimeters (8 inches) to one meter (40 inches), and is covered in small bristles. The inflorescence contains 1-15 flower heads in a flat-topped array. Each head has 14-60 yellowish disc florets but no ray florets. The fruit is an achene with a long grayish pappus.[5]

Varieties[1][5][3]

• Heterotheca oregona var. compacta (D.D.Keck) Semple from Monterey County to Siskiyou County
• Heterotheca oregona var. oregona - Washington, Oregon, California as far south as Monterey County
• Heterotheca oregona var. rudis (Greene) Semple - Oregon, California as far south as San Benito County and Amador County
• Heterotheca oregona var. scaberrima (A.Gray) Semple from Glenn County to San Luis Obispo County

References

External links

• Jepson Manual Treatment
• United States Department of Agriculture Plants Profile
• Calphotos Photo gallery, University of California

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