( But ( ( ( ( ( ( few seeds ) germinate ) , ) and ) ( literally ( none ( survive ( to ( the ( seedling ( or ( sapling stage ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (CC But) (S (NP (JJ few) (NNS seeds)) (VP (VBP germinate))) (, ,) (CC and) (S (ADVP (RB literally)) (NP (NN none)) (VP (VBP survive) (PP (TO to) (NP (DT the) (VBG seedling) (CC or) (VBG sapling) (NN stage))))) (. .)))
But few seeds germinate, and literally none survive to the seedling or sapling stage.
(ROOT (S (NP (NN Seed)) (ADVP (RB dormancy)) (VP (VBZ ensures) (SBAR (IN that) (S (NP (NNS seeds)) (VP (VBP germinate) (ADVP (RB only)) (SBAR (WHADVP (WRB when)) (S (NP (NP (NNS conditions)) (PP (IN for) (NP (JJ seedling) (NN survival)))) (VP (VBP are) (ADJP (JJ optimal))))))))) (. .)))