( ( ( ( Embryo-sac ( development Peperomia ) ) - ) type ) . )
(ROOT (NP (NP (NNP Embryo-sac) (NN development) (NNP Peperomia)) (: -) (NP (NN type)) (. .)))
Embryo-sac development Peperomia -type.
(ROOT (S (NP (NP (DT The) (JJ amniotic) (NN sac)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBD was) (VP (VBG sitting) (PP (IN on) (NP (NP (NN top)) (PP (IN of) (NP (DT the) (JJ flat) (NN embryo))))))))) (, ,)) (VP (VBZ envelops) (NP (DT the) (NN embryo)) (SBAR (IN as) (S (NP (PRP it)) (VP (VBZ folds))))) (. .)))