20A Seaweed or other vgetation floating in the sea or washed ashore 5 LETTERS ?R??K 31A North American plant with small white, reddish or green flowers and astringent roots 8 LETTERS ??U??O?T 18D _ Monkey, A Masque monkey of Southern Asia, used in medical research 24D Got away hastily; got out 8 LETTERS ?C??M?D