Heterotheca oregona

Oregon Goldenaster

Heterotheca oregona (Nutt.) Shinners is a rayless species native to Cascade Mts. and Coastal Ranges from Washington south to central California.  The species is diploid (2n=18).  See Semple (2006 FNA).

Heterotheca oregona morphology modified from Semple et al. 1988

Four varieties were recognized by Semple et al (1988) and Semple (2006):

  • var. compacta (D.D. Keck) Semple
  • var. oregona
  • var. rudis (Greene) Semple
  • var. scaberrima (A. Gray) Semple
Heterotheca oregona var. oregona, northern California
Heterotheca oregona var rudis 5687 CA hds
Heterotheca oregona scaberrima 8588
Heterotheca oregona scaberrima 8600
Heterotheca oregona var. oregona, northern California
1 / 4
Heterotheca oregona var rudis 5687 CA hds
2 / 4
Heterotheca oregona scaberrima 8588
3 / 4
Heterotheca oregona scaberrima 8600
4 / 4

Semple, J.C., C. Leeder, C. Leuty and L. Gray. 1988. Heterotheca sect. Ammodia (Compositae: Astereae): a multivariate study of H. oregona and specimens of Brewer's (golden)aster. Syst. Bot. 13: 547-558.

Last update 22 May 2023 by J.C. Semple

© 2023 J.C. Semple, including all photographs unless otherwise indicated