Richard Di Natale has sought to downplay an expose on division and infighting within the Greens.
Former Greens leader Bob Brown has accused NSW senator Lee Rhiannon of being a "team wrecker" and urged her to retire, as the party struggles with internal problems.
The ABC's Four Corners program on Monday night features interviews with key players in the Greens, including Dr Brown, who says he "looks forward" to the end of Senator's Rhiannon's "reign" in The Greens NSW.
"I've had to take Lee aside when I was party leader and tell her that she was damaging the party through her actions," he says in the program.
Senator Di Natale, who now leads the Greens, says the party welcomes the scrutiny.
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"We think it's really important that we have an opportunity to make it really clear that - certainly as the leader of the party, and of the party room - that we are united," he said before the program went to air.
"We will continue to build in our party a culture of consensus and collaboration - a strong and healthy culture - and that's what I'm committed to doing."
Senator Rhiannon was temporarily suspended from voting in the Australian Greens party room in June after insisting she was bound by Greens NSW in opposing a deal with the government on the Gonski 2.0 schools funding package.
In a statement on Monday the senator insisted she was a team player and respected the party's decisions.
"It is disappointing that a senior Greens figure such as Bob Brown should ignite tensions with public attacks," she said.
Senator Rhiannon said Dr Brown had trouble accepting some of the candidates preselected by Greens NSW and its structure, which was not dominated by MPs.
"Our stance on party structure earnt the ire of Bob Brown and he periodically comes out and attacks me. The attacks are not only hurtful, they damage the Australian Greens," she said.
The Greens have since allowed Senator Rhiannon back in the party room.
Greens senator Sarah Hanson-Young, who did not take part in the ABC program, said there were "obviously tensions about the processes we use".
"We've been up-front about that. The party room is trying to work through a lot of that," she told Sky News.
Labor frontbencher Anthony Albanese said he found Dr Brown's criticism "surprising", but correct.
"He's quite right in calling out people who've gone into his party but who aren't really loyal to that party," Mr Albanese told reporters in Canberra.
The Greens were secretive and harboured many former members of "far-left political parties", he said.
