Two new varieties described by Durand in 1859 from the Great Salt Lake area of northern Utah are discussed. One, Erysimum asperum var. purshii, is the oldest available name for the western United States variant of the species, while the second name, Acerates decumbens var. erecta, is a synonym of Asclepias asperula. Neither name has been included in botanical reference works nor in monographic studies. One new combination, Erysimum asperum var. amoenum, is proposed for the orange-flowered phase of the species found in southern Colorado and Utah.
Reveal, James L.
"Comments on two names in an early Utah flora,"
Great Basin Naturalist: Vol. 32
, Article 7.
Available at: https://scholarsarchive.byu.edu/gbn/vol32/iss4/7