[11] A complex.
[12] Bothriochloa intermedia (R. Brown) A. Camus (a complex) of Harlan & Celerier, Okla. Tech. Bul. T-72.
[13] Bothriochloa ischaemum (L.) Keng. var. ischaemum of Harlan & Celerier, Okla. Tech. Bul. T-72.
[14] Not listed in Hitchcock’s 1951 manual.
[15] A complex, including B. californicus Nutt. ex Buckl., B. marginatus Nees, B. maritimus (Piper) Hitchc., and B. polyanthus Scribn.
[16] Includes B. richardsoni Link.
[17] In written material in which B. inermis is the only Bromus species discussed, its common name may be shortened to brome.
[18] Not listed in Hitchcock’s 1951 manual.
[19] Not listed in Hitchcock’s 1951 manual.
[20] Spp. with stiff spreading spikes are called windmillgrass.