( ( ( The ( three leaflets ) ) ( growing ( in ( ( a group ) ( attached ( to ( a ( common stem ) ) ) ) ) ) ) ) ( ( will ( ( be ( your warming ) ) ( that ( it ( ( is probably ) ( ( ( poison ivy ) or ) ( poison oak ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (CD three) (NNS leaflets)) (VP (VBG growing) (PP (IN in) (NP (NP (DT a) (NN group)) (VP (VBN attached) (PP (TO to) (NP (DT a) (JJ common) (NN stem)))))))) (VP (MD will) (VP (VB be) (NP (PRP$ your) (NN warming)) (SBAR (IN that) (S (NP (PRP it)) (VP (VBZ is) (ADVP (RB probably)) (NP (NP (NN poison) (NN ivy)) (CC or) (NP (NN poison) (NN oak)))))))) (. .)))
The three leaflets growing in a group attached to a common stem will be your warming that it is probably poison ivy or poison oak.
(ROOT (S (NP (NN Poison) (NN ivy)) (ADVP (RB typically)) (VP (VBZ has) (NP (NP (CD three) (NNS groups)) (PP (IN of) (NP (NNS leaves))))) (. .)))