Entry for Noccaea fendleri (A. Gray) Holub subsp. idahoensis (Payson) Al-Shehbaz & M. Koch [family CRUCIFERAE]
Entry From
Flora of North America, Vol 7,
Names
Noccaea fendleri (A. Gray) Holub subsp. idahoensis (Payson) Al-Shehbaz & M. Koch [family CRUCIFERAE], Syst. Bot., 29: 383. 2004
Thlaspi idahoense Payson [family CRUCIFERAE], Univ. Wyoming Publ. Sci., Bot., 1: 159. 1926
Thlaspi aileeniae Rollins [family CRUCIFERAE]
Thlaspi fendleri A. Gray var. idahoense (Payson) C. L. Hitchcock [family CRUCIFERAE]
Thlaspi idahoense var. aileeniae (Rollins) Rollins [family CRUCIFERAE]
Thlaspi montanum Linnaeus var. idahoense (Payson) P. K. Holmgren [family CRUCIFERAE]
Discussion
Subspecies idahoensis is restricted to Blaine, Boise, Custer, Elmore, and Valley counties of central Idaho. Holmgren treated it as a variety of Thlaspi montanum, whereas R. C. Rollins (1993) recognized it as a species, T. idahoense, with two varieties. In my opinion, his varieties are based on continuous characters such as the loosely versus closely branched caudex, oblanceolate versus linear-oblanceolate basal leaves, and cuneate versus minutely auriculate distalmost cauline leaves.