Senior NSW Greens MP Jeremy Buckingham has broken ranks with the party after a disappointing federal election result, calling for reform to blast out unaccountable backroom leaders.

Key points: Greens MP Jeremy Buckingham calls for reform to get rid of unaccountable NSW backroom leaders

Greens MP Jeremy Buckingham calls for reform to get rid of unaccountable NSW backroom leaders Social media backlash against Jeremy Buckingham for speaking to the media

Social media backlash against Jeremy Buckingham for speaking to the media Former federal leader, Bob Brown, called for Lee Rhiannon to stand aside after poor showing in federal election

Since their formation the NSW Greens have been controlled by a dominant faction decried by critics as "watermelons", who are described as being more red than green.

The factional leaders include senator Lee Rhiannon, NSW MP David Shoebridge and Greens NSW co-convenor Hall Greenland.

Mr Buckingham would like to see all party members given a vote to blast the old guard out of key party positions.

"I'm held to account my party, I welcome that, I'm elected, the key office bearers who have a lot of authority now in a growing organisation should be subject to the same scrutiny," Mr Buckingham told 7.30.

The Watermelon faction resisted the party appointing Bob Brown as leader when the Australian Greens were formed and have refused to appoint a leader in NSW.

After the last election Mr Brown called on Senator Rhiannon and the "old guard" to resign.

Mr Buckingham wants the state party to appoint a leader and sources say his reform push has the support of senior federal Greens, including Richard Di Natale, who have long been frustrated by the state party's appointments.

"If we don't have a leader, we don't have accountability, we have de-facto leaders and that's a real problem," Mr Buckingham said.

"We need to have accountability in leadership, we need to have defined roles so we know what their responsibilities are and we assign them a strategic task to engage with the membership, to be a focal point in election campaigns potentially."

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Backlash against Buckingham starts before the interview has even gone to air

Mr Buckingham's interview has caused a major controversy within the Greens even before it has aired, with some in the NSW party calling for him to be expelled for talking to the media.

Greens member, Nick Rowbotham, called for Jeremy Buckingham's expulsion after the MP spoke to 7.30. ( Facebook )

Mr Buckingham's rival, Mr Shoebridge, who has criticised the leadership proposal, agreed to do an interview with 7.30 to put forward an alternative vision for the party, but then cancelled.

Mr Shoebridge posted about the interview in a Facebook group known as the "unofficial Greens".

"I'm just going to say it, Jeremy ought to be seriously sanctioned — or potentially expelled — for this repeated bullshit," Greens member Nick Rowbotham wrote.

David Shoebridge staffer, Tony Raue, called Jeremy Buckingham a disgrace for advocating reform of the NSW Greens. ( Facebook )

Mr Shoebridge's staffer Tom Raue called Mr Buckingham "a disgrace".

Mr Buckingham said the party should be more open to the public.

"What I want to see is us open ourselves up to the public, open ourselves up to the membership, by participating and including them in the debates," he said.

"That's how to win more support. The more people know about the Greens, the more they'll like us, the more successful they'll be."

Dr David Burchall from Western Sydney University said the state and federal Greens have long resisted applying the transparency they have campaigned for to their own party's affairs.

"It's been a peculiarity of the Greens for a long time that they don't like to talk to the media," he told 7.30.

"Now this is odd for a political party.

"We should know about them and judge their ability to rule themselves internally when thinking about whether they should be running us."

NSW Greens fighting bullying allegations in Supreme Court

The reform push comes as the NSW Greens face a Supreme Court claim from their former most senior employee, Carol Medcalf, who is alleging bullying and seeking aggravated damages.

7.30 can reveal that at the latest Greens State Delegates Council Ms Medcalf's supporters succeeded in blocking the state party's budget in an effort to deprive it of legal funds.

The NSW Greens have accused Ms Medcalf of serious misconduct and even told members they've called in police.

The party will seek to have her claim thrown out of court tomorrow.