Asclepias sullivantii Engelm.
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Authority
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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Family
Apocynaceae
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Scientific Name
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Description
Species Description - Glabrous throughout; stem rather stout, simple, to 1 m; lvs thick, 10–15 cm, narrowly or broadly elliptic to ovate or oblong, sessile or nearly so and somewhat cordate-clasping; umbels lateral at few to several upper nodes; cor purplish-rose, its lobes 9–12 mm; hoods 5–6 mm, much surpassing the gynostegium, the lateral margins entire, each hood flanked by a minute process at base; horns horizontally inflexed; fr glabrous or slightly verrucose, erect on deflexed pedicels. Moist prairies; O. and s. Ont. to Minn., N.D., and Okla. June, July.
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Common Names
smooth milkweed