( ( Poison ( ivy plants ) ) ( ( have ( ( three ( green ( , ( shiny leaves ) ) ) ) ( per cluster ) ) ) . ) )
(ROOT (S (NP (NN Poison) (NN ivy) (NNS plants)) (VP (VBP have) (NP (NP (CD three) (JJ green) (, ,) (JJ shiny) (NNS leaves)) (PP (IN per) (NP (NN cluster))))) (. .)))
Poison ivy plants have three green, shiny leaves per cluster.
(ROOT (S (NP (NN Poison) (NN ivy)) (ADVP (RB typically)) (VP (VBZ has) (NP (NP (CD three) (NNS groups)) (PP (IN of) (NP (NNS leaves))))) (. .)))