Solidago hispida Muhl. is widely distributed in eastern North America (Semple & Cook 2006 FNA). It has been treated as Solidago bicolor var. concolor Tor. & A. Gray and S. bicolor var. hispida (Muhl.) Britton, Sterns & Poggenberg. The species is highly variable in stem and leaf pubescence ranging from plants with lanate stems and leaves to those with essentially no hairs on the stems and leaves. Hair length ranges from very short (0.2 mm) to long (2 mm) on the stem. The fruits are sparsely to moderately strigose pubescent. Rays are always yellow, but can fade post flowering. A number of varieties have been recognized; intermediates are common. The typical variety is the most hairy, while var. huronensis is the least hairy (usually glabrous). Whether or not all varieties listed below should be recognized is open to discussion and detailed comparisons. The species is known only at the diploid level 2n=18.
Semple, J.C., L. Tong, Y. A. Chong and M. Kaddoura. 2017. Multivariate studies of Solidago subsect. Squarrosae. II. The Solidago bicolor –S. hispida complex (Asteraceae: Astereae). Phytoneuron 2017-33: 1–44.
Last update 28 April 2017 by J.C. Semple
© 2017 J.C. Semple, including all photographs unless otherwise indicated