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Edward E. Schilling +
unknown +
Stiff sunflower +  and hélianthe rigide +
Alta. +, B.C. +, Man. +, Ont. +, P.E.I. +, Que. +, Sask. +, Ark. +, Conn. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, Maine +, Mass. +, Mich. +, Minn. +, Mo. +, Mont. +, Nebr. +, N.H. +, N.J. +, N.Dak. +, Okla. +, R.I. +, S.Dak. +, Tex. +, Vt. +, Va. +  and Wis. +
50–600+ m +
Dry to moderately wet prairies, open places +
Flowering late summer–fall. +
Gen. N. Amer. Pl. +
Helianthus laetiflorus var. rigidus +  and Helianthus rigidus +
Helianthus pauciflorus subsp. pauciflorus +
Helianthus pauciflorus +
subspecies +