( Ferns ( are ( homosporous ( -LRB- ( ( ( ( single type ) ( of spore ) ) formed ) -RRB- ) ) ) ) )
(ROOT (S (NP (NNS Ferns)) (VP (VBP are) (NP (NP (NNS homosporous)) (PRN (-LRB- -LRB-) (NP (NP (JJ single) (NN type)) (PP (IN of) (NP (NN spore))) (VP (VBN formed))) (-RRB- -RRB-))))))
Ferns are homosporous (single type of spore formed)
(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))))) (. .)))