( ( The epidermis ) ( also ( ( may ( ( contain stomata ) ( for ( ( gas ( exchange ( and ( multicellular ( stem hairs ) ) ) ) ) ( called trichomes ) ) ) ) ) . ) ) )
(ROOT (S (NP (DT The) (NNS epidermis)) (ADVP (RB also)) (VP (MD may) (VP (VB contain) (NP (NN stomata)) (SBAR (IN for) (S (NP (NN gas) (NN exchange) (CC and) (NN multicellular) (NN stem) (NNS hairs)) (VP (VBD called) (NP (NNS trichomes))))))) (. .)))
The epidermis also may contain stomata for gas exchange and multicellular stem hairs called trichomes.
(ROOT (S (NP (NP (DT The) (NNS epidermis)) (PP (IN of) (NP (DT a) (NN leaf)))) (VP (VBZ contains) (NP (NP (NNS openings)) (VP (VBN known) (PP (IN as) (NP (NP (NN stomata)) (, ,) (SBAR (WHPP (IN through) (WHNP (WDT which))) (S (NP (NP (DT the) (NN exchange)) (PP (IN of) (NP (NNS gases)))) (VP (VBZ takes) (NP (NN place)))))))))) (. .)))