( ( These plants ) ( ( lack ( veins ( to ( ( transport water ) ( throughout ( their system ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT These) (NNS plants)) (VP (VBP lack) (S (NP (NNS veins)) (VP (TO to) (VP (VB transport) (NP (NN water)) (PP (IN throughout) (NP (PRP$ their) (NN system))))))) (. .)))
These plants lack veins to transport water throughout their system.
(ROOT (S (NP (NNS Stems)) (VP (VBD transport) (NP (NN water)) (PP (TO to) (NP (NP (JJ other) (NNS parts)) (PP (IN of) (NP (DT the) (NN plant))))) (PP (IN through) (NP (NP (DT a) (NN system)) (PP (IN of) (NP (NNS tubes)))))) (. .)))