( ( Gametophytes ( of homosporous ) ) ( ferns . ) )
(ROOT (S (NP (NP (NNS Gametophytes)) (PP (IN of) (NP (NNS homosporous)))) (VP (VBZ ferns)) (. .)))
Gametophytes of homosporous ferns.
(ROOT (S (NP (JJS Most) (NNS ferns)) (VP (VP (VBP produce) (NP (NP (DT the) (JJ same) (NN type)) (PP (IN of) (NP (NNS spores))))) (CC and) (VP (VBP are) (ADVP (RB therefore)) (VP (VBN called) (NP (NNS homosporous))))) (. .)))