( ( ( Creeping aboveground ) stems ) ( , ( ( called ( ( ( ( runners or ) stolons ) , ) ( ( trail ( along ( on top ) ) ) ( of ( the ground ) ) ) ) ) . ) ) )
(ROOT (SINV (S (NP (VBG Creeping) (NN aboveground)) (VP (VBZ stems))) (, ,) (VP (VBD called)) (NP (NP (NNS runners) (CC or) (NNS stolons)) (, ,) (NP (NP (NN trail)) (ADVP (IN along) (PP (IN on) (NP (NN top)))) (PP (IN of) (NP (DT the) (NN ground))))) (. .)))
Creeping aboveground stems, called runners or stolons, trail along on top of the ground.
(ROOT (S (S (NP (DT Some) (NNS plants)) (VP (VP (VBP have) (NP (NNS stolons))) (, ,) (CC or) (VP (VBZ stems)))) (, ,) (NP (DT that)) (VP (VP (VBP run) (PRT (RP along)) (NP (DT the) (NN ground))) (CC and) (VP (VBP are) (ADVP (RB commonly)) (VP (VBN called) (NP (NNS runners))))) (. .)))