The diminutive 19-year-old has been dubbed "The Machine" by her team-mates for the way she "bangs it up the middle" and consistently hits fairways and greens.
That consistency paid off when she defeated the boys with rounds of 69 and 71 (her scores were modified and lowered three strokes) and helped Kristin School claim the teams' title.
Kristin coach and manager Bryce Cattell said his young charge was a determined and unflappable character who deserved victory.
"We have a nickname for her," Cattell said.
"We call her `The Machine' because she bangs it up the middle, puts it on the green and her short game is superb.
"She is very focused and even when the conditions are bad she is able to put it to the side and focus on getting the job done."
Cattell said Jane was a quiet girl but underneath the cool exterior she was very excited about her win.
"What I like about Jane is her first thoughts were for the team and what she has done for the team."
Heavy rain overnight and persistent drizzle left the Balmacewen greens and fairways sluggish.
But despite the miserable conditions there was some top golf played over the two rounds.
Jane shared the lead with team-mate James Beale and Otago Boys' High School's leading player Thomas Facer after her opening round of 69.
Jane's second round was two shots higher but both James and Thomas could only manage a round of 73 and had to be content with sharing second place.
Kristin School (North Shore) led the team's event after the first round with a combined score of 214 with Otago Boys' High School second on 217 and the highly-touted St Bede's College (Christchurch) on 224.
Otago Boys' slipped from second to fifth following a disappointing second round.
Team manager Bill Trewern said his side "played out of its skin in the morning" but could not repeat the effort during the afternoon.
"Suddenly the putts weren't dropping," he explained.
St Bede's improved in the afternoon and finished second equal with Rotorua Boys' High School on 445.
Kristin School finished on 433.
