( ( The understory ) ( ( would ( have ( included ( ( ( ( tree ferns ) , ) ( seed ( ferns ( , ( ( horsetails and ) cycads ) ) ) ) ) ( -LRB- ( ( Sago palms ) -RRB- ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN understory)) (VP (MD would) (VP (VB have) (VP (VBN included) (NP (NP (NN tree) (NNS ferns)) (, ,) (NP (NN seed) (NNS ferns) (, ,) (NNS horsetails) (CC and) (NNS cycads)) (PRN (-LRB- -LRB-) (NP (NNP Sago) (NNS palms)) (-RRB- -RRB-)))))) (. .)))
The understory would have included tree ferns , seed ferns, horsetails and cycads (Sago palms).
(ROOT (S (NP (NP (DT The) (NN understory)) (PP (IN of) (NP (DT the) (NN rainforest)))) (ADVP (RB commonly)) (VP (VBZ has) (NP (NP (NNS ferns)) (CC and) (NP (JJ other) (NN ground) (NNS plants)))) (. .)))