Milkweed

Any plant of the genera Asclepias and Acerates, abounding in a milky juice, and having its seed attached to a long silky down; silkweed. The name is also applied to several other plants with a milky juice, as to several kinds of spurge.

any of numerous plants of the genus Asclepias having milky juice and pods that split open releasing seeds with downy tufts

annual Eurasian sow thistle with soft spiny leaves and rayed yellow flower heads