Solidago rugosa

Solidago rugosa Mill. (N-Am.) – A very rare and mostly ephemeral escape from cultivation (probably sometimes temporarily persistent locally). Apparently first recorded in a hedge in Vorst (Brussel) in 1883.

The only recent claim for S. rugosa was from a private garden in Eeklo (origin uncertain but possibly introduced with gravel) from where it was known since ca. 1996 (comm. W. White). This population is aberrant in being subglabrous, suggesting var. sphagnophila Graves (Yeo 2000, Semple & Cook 2006). However, it was recently identified by J. Semple as belonging to a hybrid of S. gigantea and an unknown second parent, not to S. rugosa.

Solidago rugosa is superficially similar to S. canadensis and S. gigantea and is possibly overlooked (see also Landolt 2006). It is usually smaller and rarely exceeds 100 cm.

Solidago rugosa, Eeklo, garden weed, August 2012, W. White Solidago rugosa, Eeklo, garden weed, August 2012, W. White

Herbarium specimen


Selected literature:

Beaudry J.R. (1978) Etudes sur les Solidago L.: 12. Hybridation entre deux especes sympatriques, S. purshii et S. rugosa. Nat. Canad. 105(4): 285-290.

Landolt E. (2006) Solidago rugosa Ait., ein übersehener Neophyt in der Schweiz. Bot. Helv. 116: 100-104.

Often A. (1997) Skrotemark i Oslo med to nye korgplanter: Senecio inaequidens DC. og Solidago rugosa Mill. Blyttia 55: 141-144.

Semple J.C., Bzovsky S. & Tong L.  (2016) Typification of Solidago chapmanii (Asteraceae: Astereae)  and a multivariate comparison with S. drummondii, S. fistulosa, S. odora and S. rugosa.  Phytoneuron 2016-12: 1–16. [available online at:]

Semple J.C. & Cook R.E. (2006) Solidago. In: Flora of North America Editorial Committee (eds.), Flora of North America, vol. 20. Oxford University Press, New York-Oxford: 107-166.

Yeo P.F. (2000) Solidago. In: Cullen J. & al. (eds.), The European Garden Flora, vol. 6. Cambridge University Press, Cambridge: 566-570.

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith