Sullivant’s Milkweed (Asclepias sullivantii) — Upright stem and opposite leaves — DSCN2528

Field photograph of Sullivant’s Milkweed (Asclepias sullivantii). Upright Sullivant’s Milkweed stem with opposite upswept leaves, pink midveins and upper flower clusters in open prairie. Photograph by Brian Woolman for Where’s Wildlife. Original image: Sullivants-Milkweed-Asclepias-sullivantii-Flower-DSCN2528.jpg.