Helianthus rigidus (Cass.) Desf.
[= Helianthus pauciflorus ssp. pauciflorus]
Annotated by D. Leininger, 24 Aug 1978. Remarks: At MONT. Verified: J. H. Rumely at MONT 17 November 1995. = H. r. subsp. subrhomboideus (Rydb.) Heiser. =H. laetiflorus Pers.

Montana: Big Horn County: Somewhere along OK-A-Beh Roads. which starts 0.4 kilometers ( 1/4 mile) West of Fort Smith in S16, continues South and West for 12.8 kilometers (8 miles) through S21, S28, S 32, and S 31, then goes Northwest in unsurveyed land in T6S and R 30E t o OK-A-Beh boat ramp, which is 4.8 kilometers (3 miles) West of Fort Smith adn 1.6 kilometers (1 mile) Wests of Yellowtail Dam. S (as above), T 6S, R30E, and 31E MPM. Elev. 1230 m.
45.31278° N, 107.93639° W,
Datum: WGS 84. Uncertainty: 2007 meters. Coordinate Source: Digital Map.
Grassland. Phenology: Flowers.

James A. Mack JM39, Jul 25, 1974
MONT, Accession: 73362