Solidago caesia

Blue-stem or Woodland or Wreath Goldenrod, verge d’or bleuâtre

Solidago caesia L. is a common woodland goldenrod in eastern North America. The stems are usually bluish to purple, glaucous and arching and the heads occur in small clustered subtended by large upper stem leaves (). The species is diploid (2n=18) throughout its range (Cook & Semple 2008).

Solidago caesia range Cook & Semple draft

Two varieties were recognized in FNA based on work by R.E. Cook (Cook & Semple 2008; Cook et al. 2009).  Further research indicates that var. zedia should be treated as a separate species.

  • ±¹²¹°ù.Ìýcaesia
  • ±¹²¹°ù.Ìýzedia  = Solidago zedia

Cook, R.E. and J.C. Semple. 2008. The cytogeography of Solidago subsect. Glomeruliflorae (Asteraceae: Astereae). Botany 86: 1488-1496.

Last revised 10 April 2025 by J.C. Semple     

© 2025 J.C. Semple, including all photographs unless otherwise indicated

Solidago caesia, habit, Arkansas
Solidago caesia stem
Solidago caesia S 10651 leaf
Solidago caesia S 2387 ON inflor
Solidago caesia S 10651 hds
Solidago caesia S 10651

1-6. Solidago caesia. 1. Habit, Searcy Co., Arkansas. 2. Upper stem, Semple & Cook 10651, Peel Co., Ontario. 3. Leaf in inflorescence, S & C 10651. 4. Inflorescence with multiple long branches, Semple 2387, À¶Ý®ÊÓƵ Reg. Mun., Ontario. 5. Axillary inflorescence branches, S & C 10651. 6. Florets, S & C 10651.