Asclepias viridis - Spider Milkweed
Spider Milkweed is common in pastures from Kansas to Texas. This dwarf species grows about a foot tall with multiple stems emerging from the root crown. It blooms clusters of lime green with deep pink centers. It's very showy and spreads slowly, a great choice for a backyard butterfly garden.
This milkweed species is avoided by livestock but is extremely attractive to Monarch butterflies. Deer will leave it alone, but Monarchs will find it and raise families right outside your window.