( Thus ( , ( ( the ( flowering plants ) ) ( actually ( ( ( ( have ( ( three ( major types ) ) ( of mutualism ) ) ) , ) ( since ( ( most ( higher plants ) ) ( also ( have mycorrhizae ) ) ) ) ) . ) ) ) ) )
(ROOT (S (ADVP (RB Thus)) (, ,) (NP (DT the) (JJ flowering) (NNS plants)) (ADVP (RB actually)) (VP (VBP have) (NP (NP (CD three) (JJ major) (NNS types)) (PP (IN of) (NP (NN mutualism)))) (, ,) (SBAR (IN since) (S (NP (RB most) (JJR higher) (NNS plants)) (ADVP (RB also)) (VP (VBP have) (NP (NN mycorrhizae)))))) (. .)))
Thus, the flowering plants actually have three major types of mutualism, since most higher plants also have mycorrhizae.
(ROOT (S (NP (NNP Modern) (NNS plants)) (VP (VBP have) (NP (NP (CD three) (NNS types)) (PP (IN of) (NP (JJ major) (NNS tissues))))) (. .)))