Solidago ulmifolia Muhl. is native to woods and wood margins in eastern North America. Stem leaves are sparsely hirsute at least on the abaxial midribs and main nerves, and the inflorescences often consists of a few long arching branching with clusters of terminal flowers (Semple & Cook 2006 FNA). Plants with shorter branched secund-pyramidal inflorescences can be confused with S. rugosa var. rugosa. Only diploids 2n=18 are known in S. ulmifolia.
Two varieties based on differences in stem pubescence are usually recognized:
Solidago helleri is possibly a hybrid between S. ulmifolia with S. delicatula.
Last updated 12 November 2013 by J.C. Semple
© 2013 J.C. Semple, including all photographs unless otherwise indicated.