( ( ( stoma ( -LRB- ( ( ( plural , ) stomata ) -RRB- ) ) ) ( ( ( A ( microscopic pore ) ) ( ( ( surrounded ( by ( ( guard cells ) ( in ( ( the epidermis ) ( of leaves ) ) ) ) ) ) and ) stems ) ) ( that ( allows ( ( ( ( gas exchange ) ( between ( the environment ) ) ) and ) ( ( the interior ) ( of ( the plant ) ) ) ) ) ) ) ) . )
(ROOT (NP (NP (NP (NN stoma)) (PRN (-LRB- -LRB-) (NP (NNP plural)) (, ,) (NP (NNP stomata)) (-RRB- -RRB-))) (NP (NP (DT A) (JJ microscopic) (NN pore)) (VP (VP (VBN surrounded) (PP (IN by) (NP (NP (NN guard) (NNS cells)) (PP (IN in) (NP (NP (DT the) (NNS epidermis)) (PP (IN of) (NP (NNS leaves)))))))) (CC and) (VP (VBZ stems))) (SBAR (WHNP (WDT that)) (S (VP (VBZ allows) (NP (NP (NP (NN gas) (NN exchange)) (PP (IN between) (NP (DT the) (NN environment)))) (CC and) (NP (NP (DT the) (NN interior)) (PP (IN of) (NP (DT the) (NN plant))))))))) (. .)))
stoma (plural, stomata) A microscopic pore surrounded by guard cells in the epidermis of leaves and stems that allows gas exchange between the environment and the interior of the plant.
(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)))))))))) (. .)))