Crossword clue: any plant of the genera asclepias and acerates whose seed vessels contain a long, silky down; milkweed.
1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
any of numerous plants of the genus Asclepias having milky juice and pods that split open releasing seeds with downy tuf