( They ( ( ( are perhaps ) ( ( the ( most primitive ) ) ( of ( the ( early ( vascular ( land plants ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBP are) (ADVP (RB perhaps)) (NP (NP (DT the) (ADJP (RBS most) (JJ primitive))) (PP (IN of) (NP (DT the) (JJ early) (NN vascular) (NN land) (NNS plants))))) (. .)))
They are perhaps the most primitive of the early vascular land plants.
(ROOT (S (NP (NP (DT The) (ADJP (RBS most) (JJ basic)) (NN division)) (PP (IN of) (NP (NN land) (NNS plants)))) (VP (VBZ is) (PP (IN between) (NP (NN nonvascular) (CC and) (NN vascular) (NNS plants)))) (. .)))