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*Helianthus pauciflorus Nuttall ssp. subrhomboideus (Rydberg) O. Spring & E.E. Schilling. Subrhomboidal Sunflower. Phen: Aug-Oct. Hab: Pastures, roadsides, and along railroads. Dist: ON, MI. west to BC, south to IN, MO, OK, and w. TX.

Origin/Endemic status: Native

Synonymy: = FNA21, K3, K4, NE, NY; = Helianthus laetiflorus Pers. var. subrhomboideus (Rydber) Fernald – F, Tx; = Helianthus pauciflorus Nutt. var. subrhomboideus (Rydb.) Cronquist – C; = Helianthus subrhomboideus Rydb.; < Helianthus pauciflorus Nutt. – Mi

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image of plant© aarongunnar, some rights reserved (CC BY), uploaded by aarongunnar source CC-BY | Original Image ⭷ Warning: was NOT research grade.
image of plant© Eric Lamb, some rights reserved (CC BY), uploaded by Eric Lamb source CC-BY | Original Image ⭷
image of plant© Eric Lamb, some rights reserved (CC BY), uploaded by Eric Lamb source CC-BY
image of plant© aarongunnar, some rights reserved (CC BY), uploaded by aarongunnar source CC-BY | Original Image ⭷ Warning: was NOT research grade.
image of plant© aarongunnar, some rights reserved (CC BY), uploaded by aarongunnar source CC-BY
image of plant© aarongunnar, some rights reserved (CC BY), uploaded by aarongunnar source CC-BY | Original Image ⭷ Warning: was NOT research grade.

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