( ( Like twigs ) ( , ( ( ( ( ( flowers ( develop ( from buds ) ) ) , ) and ) ( ( ( the ( basic ( floral parts ) ) ) ( -LRB- ( ( ( sepal , ) ( petal ( , ( stamen ( , ( and carpel ) ) ) ) ) ) -RRB- ) ) ) ( are ( in ( ( actual fact ) ( greatly ( modified leaves ) ) ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN Like) (NP (NNS twigs))) (, ,) (S (NP (NNS flowers)) (VP (VBP develop) (PP (IN from) (NP (NNS buds))))) (, ,) (CC and) (S (NP (NP (DT the) (JJ basic) (JJ floral) (NNS parts)) (PRN (-LRB- -LRB-) (NP (NP (NN sepal)) (, ,) (NP (NN petal) (, ,) (NN stamen) (, ,) (CC and) (NN carpel))) (-RRB- -RRB-))) (VP (VBP are) (PP (IN in) (NP (NP (JJ actual) (NN fact)) (VP (ADVP (RB greatly)) (VBN modified) (NP (NNS leaves))))))) (. .)))
Like twigs, flowers develop from buds, and the basic floral parts (sepal, petal, stamen, and carpel) are in actual fact greatly modified leaves.
(ROOT (S (S (NP (NP (NNS Sepals)) (, ,) (NP (NNS petals)) (, ,)) (VP (VBZ stamens))) (, ,) (CC and) (S (NP (NNS carpels)) (VP (VBP are) (NP (JJ floral) (NNS organs)))) (. .)))