Helianthus pauciflorus subsp. subrhomboideus
Biochem. Syst. & Ecol. 18: 22. 1990.
Common names: Hélianthe subrhomboïdal
Endemic
Basionym: Helianthus subrhomboideus Rydberg Mem. New York Bot. Gard. 1: 419. 1900
Synonyms: Helianthus laetiflorus var. subrhomboideus (Rydberg) Fernald Helianthus pauciflorus var. subrhomboideus (Rydberg) Cronquist Helianthus rigidus subsp. subrhomboideus (Rydberg) Heiser Helianthus rigidus var. subrhomboideus (Rydberg) Cronquist
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Plants 50–120 cm. Leaves opposite; blades rhombic-ovate to lance-linear, 5–12 cm, apices acute or obtuse.
Phenology: Flowering summer–early fall.
Habitat: Dry, open places
Elevation: 400–2400 m
Distribution
Alta., Man., N.B., N.S., Ont., Que., Sask., Colo., Conn., Ill., Ind., Iowa, Kans., Maine, Mass., Minn., Mo., Mont., Nebr., N.H., N.J., N.Mex., N.Dak., Pa., R.I., S.Dak., Tex., Vt., Wis., Wyo.
Discussion
Selected References
None.
Lower Taxa
None.