Rough-stemmed or Wrinkle-leaf Goldenrod , verge d’or rugueuse
Solidago rugosa Miller is highly variable in stem height, degree of leaf wrinkling, inflorescence shape and branch length, and hairiness. It is similar to members of the S. canadensis complex in lacking lower stem leaves at the time of flowering; it differs in not having 3-nerved leaves. The species includes diploids 2n=18 (four varieties), tetraploids 2n=36 (all varieties), and hexaploids 2n=54 (only var. sphagnophila).
The species is divided into two subspecies and five varieties that can be difficult to distinguish (Semple & Cook 2006 FNA).
- ssp. rugosa
- ssp. aspera
Last updated 13 November 2013 by J.C. Semple
© 2013 J.C. Semple, including all photographs unless otherwise indicated.