Solidago ouachitensis

Ouachita Mountains Goldenrod

Solidago ouachitensis C.E.S. Taylor & R.J. Taylor is rare on mesic, north-facing slopes in the Ouachita Mts. western Arkansas and eastern Oklahoma. Historically, Solidago ouachitensis has been included in S. caesia or S. curtisii; it is ecologically and morphologically distinct (Semple & Cook 2006 FNA). In the polygenomic phylogeny of Solidago, S. ouachitensis came out as the basal branch in sect. Glomeruliflorae (Semple et al. 2023). The species is diploid (2n=18).

Solidago ouachitensis range Cook & Semple draft

Semple, J.C., H. McMinn-Sauder, M. Stover, A.Lemmon, E. Lemmon, and J.B. Beck. 2023. Goldenrod herbariomics: Hybrid-sequence capture reveals the phylogeny of diploid Solidago. Amer. J. Bot. 110(7): e16164.https://doi.org/10.1002/ajb2.16164

Last revised 11 April 2025 by J.C. Semple     

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

Solidago ouachitensis, Polk Co., Arkansas
Solidago ouachitensis IT GH leaf
Solidago ouachitensis IT GH hds
Solidago ouachitensis, fruits, Polk Co., Arkansas

1-2. Solidago ouachitensis. 1. Isotype, Taylor & Taylor 32788 NY, Leflore Co., Oklahoma. 2-4. Leaf, heads, fruit body, Taylor & Taylor 32786 GH, Polk Co., Arkansas.