( ( ( Corolla ( Collective term ) ) ( for ( ( all ( the petals ) ) ( of ( ( ( a flower ) , ) ( these petals ) ) ) ) ) ) ( ( may ( ( be ( ( separate or ) fused ) ) together ) ) . ) )
(ROOT (S (NP (NP (NNP Corolla) (NNP Collective) (NN term)) (PP (IN for) (NP (NP (PDT all) (DT the) (NNS petals)) (PP (IN of) (NP (NP (DT a) (NN flower)) (, ,) (NP (DT these) (NNS petals))))))) (VP (MD may) (VP (VB be) (ADJP (JJ separate) (CC or) (JJ fused)) (ADVP (RB together)))) (. .)))
Corolla Collective term for all the petals of a flower, these petals may be separate or fused together.
(ROOT (S (NP (NP (DT All)) (PP (IN of) (NP (DT the) (NNS petals)))) (ADVP (RB together)) (VP (VBP are) (VP (VBN called) (NP (DT a) (NN corolla)))) (. .)))
All of the petals together are called a corolla.