( ( Frost flowers ) ( ( ( are ( ( ice crystals ) commonly ) ) ( found ( growing ( on ( ( young ( sea ( ice ( and ( thin ( lake ice ) ) ) ) ) ) ( in ( ( cold ( , calm ) ) conditions ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Frost) (NNS flowers)) (VP (VBP are) (ADVP (NP (CD ice) (NNS crystals)) (RB commonly)) (VP (VBN found) (S (VP (VBG growing) (PP (IN on) (NP (NP (JJ young) (NN sea) (NN ice) (CC and) (JJ thin) (NN lake) (NN ice)) (PP (IN in) (NP (ADJP (JJ cold) (, ,) (JJ calm)) (NNS conditions))))))))) (. .)))
Frost flowers are ice crystals commonly found growing on young sea ice and thin lake ice in cold, calm conditions.
(ROOT (S (NP (NP (DT The) (NN ice) (NNS crystals)) (SBAR (WHNP (WDT that)) (S (VP (VBP form) (PP (IN on) (NP (DT the) (NN ground))))))) (VP (VBP are) (VP (VBN called) (S (ADJP (JJ frost))))) (. .)))