( ( When ( ( two ( compatible hyphae ) ) ( meet ( they ( ( join together ) ( to ( form ( another network ) ) ) ) ) ) ) ) ( ( called ( ( the ( ` ( Mycelium ' ) ) ) ( which ( ( ( ( grows quietly ) and ) ( ( unseen ( under ground ) ) ( for ( most ( of ( the year ) ) ) ) ) ) ( ( ( until ( ( the conditions ) ( are ( right ( for fruiting ) ) ) ) ) and ) ( that ( 's ( when ( we ( get ( to ( see mushrooms ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (CD two) (JJ compatible) (NN hyphae)) (VP (VBP meet) (S (NP (PRP they)) (VP (VB join) (PRT (RP together)) (S (VP (TO to) (VP (VB form) (NP (DT another) (NN network)))))))))) (VP (VBD called) (NP (NP (DT the) (`` `) (NNP Mycelium) ('' ')) (SBAR (WHNP (WDT which)) (S (VP (VP (VBZ grows) (ADVP (RB quietly))) (CC and) (VP (ADJP (JJ unseen) (PP (IN under) (NP (NN ground)))) (PP (IN for) (NP (NP (JJS most)) (PP (IN of) (NP (DT the) (NN year)))))) (SBAR (SBAR (IN until) (S (NP (DT the) (NNS conditions)) (VP (VBP are) (ADJP (JJ right) (PP (IN for) (S (VP (VBG fruiting)))))))) (CC and) (SBAR (WHNP (WDT that)) (S (VP (VBZ 's) (SBAR (WHADVP (WRB when)) (S (NP (PRP we)) (VP (VBP get) (S (VP (TO to) (VP (VB see) (NP (NNS mushrooms))))))))))))))))) (. .)))
When two compatible hyphae meet they join      together to form another network called the 'Mycelium' which grows quietly      and unseen under ground for most of the year until the conditions are right      for fruiting and that's when we get to see mushrooms.
(ROOT (S (NP (DT A) (NN mushroom)) (VP (VBZ is) (NP (NP (DT the) (VBG fruiting) (NN body)) (SBAR (WHNP (WDT that)) (S (VP (VBZ occurs) (SBAR (IN after) (S (NP (CD two) (NN hyphae)) (VP (VB mate) (CC and) (VB form) (NP (DT a) (NN mycelium)) (PP (IN with) (NP (NN sporangia))))))))))) (. .)))