( ( In California ) ( ( , ( ( ( most trout ) ( streams ( ( are high-gradient ) ( -LRB- ( mountain -RRB- ) ) ) ) ) , ) ) ( rocky ( ( ( streams and ) ( ( are often ) ( heavily ( shaded ( by ( surrounding forest ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (NNP California))) (PRN (, ,) (S (NP (JJS most) (NNS trout)) (VP (VBZ streams) (SBAR (S (VP (VBP are) (ADJP (JJ high-gradient)) (PRN (-LRB- -LRB-) (NP (NN mountain)) (-RRB- -RRB-))))))) (, ,)) (NP (JJ rocky)) (VP (VP (VBZ streams)) (CC and) (VP (VBP are) (ADVP (RB often)) (ADJP (RB heavily) (JJ shaded) (PP (IN by) (S (VP (VBG surrounding) (NP (NN forest)))))))) (. .)))
In California, most trout streams are high-gradient (mountain), rocky streams and are often heavily shaded by surrounding forest.
(ROOT (S (NP (NNS Streams)) (ADVP (RB often)) (VP (VBP start) (PP (IN in) (NP (NNS mountains)))) (. .)))