( ( refers ( to ( flowers ( that ( depend ( on ( ( the wind ) ( for pollination ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VBZ refers) (PP (TO to) (NP (NP (NNS flowers)) (SBAR (WHNP (WDT that)) (S (VP (VBP depend) (PP (IN on) (NP (NP (DT the) (NN wind)) (PP (IN for) (NP (NN pollination))))))))))) (. .)))
refers to flowers that depend on the wind for pollination.
(ROOT (S (NP (NP (NNS Flowers)) (VP (VBN pollinated) (PP (IN by) (NP (NN wind))))) (ADVP (RB generally)) (VP (VBP lack) (NP (JJ brightly) (VBN colored) (NNS parts))) (. .)))