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Asclepias tuberosa Linnaeus var. cordata Beck. Midwestern Butterflyweed. Phen: (Apr-) May-Sep (-Oct); Jun-Oct. Hab: Dry forests, roadbanks. Dist: QC, ON, MN, SD, CO, UT, and CA south to PA, WV, KY, TN, and AL.

Origin/Endemic status: Native

Taxonomy Comments: Woodson (1954) called this A. tuberosa ssp. interior, and Shinners made a combination at varietal rank (see synonymy), but the much earlier name A. tuberosa var. cordata Beck clearly applies here.

Synonymy: = Asclepias tuberosa L. ssp. interior Woodson – G, Il, Mo2, NcTx, NE, Tx, Woodson (1954); = Asclepias tuberosa L. var. interior (Woodson) Shinners – C, Tn; < Asclepias tuberosa L. – F, Mi, NY, Ok, Pa, S; < Asclepias tuberosa L. ssp. interior Woodson – Ar, FNA14, GrPl, K1, K3, K4

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Heliophily: 8

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image of plant© Scott Allen Davis, some rights reserved (CC BY), uploaded by Scott Allen Davis source CC-BY | Original Image ⭷
image of plant© Scott Allen Davis, some rights reserved (CC BY), uploaded by Scott Allen Davis source CC-BY
image of plant© Scott Allen Davis, some rights reserved (CC BY), uploaded by Scott Allen Davis source CC-BY | Original Image ⭷
image of plant© Scott Allen Davis, some rights reserved (CC BY), uploaded by Scott Allen Davis source CC-BY
image of plant© Scott Allen Davis, some rights reserved (CC BY), uploaded by Scott Allen Davis source CC-BY
image of plant© Scott Allen Davis, some rights reserved (CC BY), uploaded by Scott Allen Davis source CC-BY | Original Image ⭷
image of plant© Samantha Heller, some rights reserved (CC BY), uploaded by Samantha Heller source CC-BY
image of plant© Scott Allen Davis, some rights reserved (CC BY), uploaded by Scott Allen Davis source CC-BY

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