Trichostema coeruleum (Michx.) Weakley, Alan S., Kees, John C., Sorrie, Bruce A., Ward, Scott G., Poindexter, Derick B., Brock, Mason, Estes, L. Dwayne, Bridges, Edwin L., Orzell, Steve L., Levin, Geoffrey A., McClelland, R. Kevan Schoonover, Schmidt, Ryan J. & Namestnik, Scott A., 2023

Weakley, Alan S., Kees, John C., Sorrie, Bruce A., Ward, Scott G., Poindexter, Derick B., Brock, Mason, Estes, L. Dwayne, Bridges, Edwin L., Orzell, Steve L., Levin, Geoffrey A., McClelland, R. Kevan Schoonover, Schmidt, Ryan J. & Namestnik, Scott A., 2023, Studies In The Vascular Flora Of The Southeastern United States. Ix, Journal of the Botanical Research Institute of Texas 17 (1), pp. 191-257 : 222

publication ID	https://doi.org/10.17348/jbrit.v17.i1.1293
persistent identifier	https://treatment.plazi.org/id/03B387CF-495D-6508-FFD0-FB5957F6621D
treatment provided by	Felipe
scientific name	Trichostema coeruleum (Michx.)
status	comb. nov.

Treatment

Trichostema coeruleum (Michx.) View in CoL K.S. McClell. & Weakley, comb. nov. BASIONYM: Isanthus coeruleus Michx.,Fl. Bor.- Amer.(Michaux) View in CoL 2:4. 1803. TYPE: U.S.A. [KENTUCKY]: Michaux s.n. (LECTOTYPE, designated here: P, microfiche!digital image!); the same as Isanthus coeruleus Michx. (designated by Uttal 1984) in accordance with Article 7.3 of the ICN ( Turland et al.2018).

Isanthus pumilus Raf. View in CoL , New Fl. N.Amer.2:34–35.1837. TYPE: U.S.A.: West Kentucky and Illinois, Rafinesque s.n. (SYNTYPES, designated by Rafinesque 1837).

Isanthus pubescens Raf. View in CoL , New Fl. N. Amer. 2:35. 1837. TYPE: U.S.A. KENTUCKY: Mts. Wasioto or Cumberland, Rafinesque s.n. (SYNTYPES, designated by Rafinesque 1837).

Isanthus multiflorus Raf. View in CoL , New Fl. N. Amer.2:35.1837. TYPE: U.S.A. KENTUCKY: in the Wasioto hills, Rafinesque s.n. (SYNTYPES, designated by Rafinesque 1837). Notes. —This and the previous two species all seem to be local variations of T.coeruleum View in CoL rather than distinct species ( Lewis 1945). No illustrations were included in the publication, thus no original material is known to exist by the author from which to choose a lectotype. Neotypes are in the process of being chosen for these three taxa (McClelland in prep.).

Isanthus brachiatus View in CoL (L.) Britton, Sterns, & Poggenb. var. linearis Fassett, Rhodora 35(420):388. 1933. TYPE: CANADA. ONTARIO. Manitoulin District : dry limestone flats, Cloche Peninsula , 20 Aug 1932, N. C. Fassett 14770 (HOLOTYPE: WIS, internet image!; ISOTYPES: CMN, GH, internet image!). Notes.— Until common garden and genetic data is collected, we follow Lewis’ (1945) treatment of this variety as a synonym of the species .