Tensions in the NSW Greens have boiled over spectacularly, with Newtown MP Jenny Leong storming out of a party room meeting on Monday after reportedly yelling "F--- you!" at colleague David Shoebridge.

Fairfax Media understands the clash was related to concerns over Mr Shoebridge's more prominent appearance in the media across portfolio areas following the death of senior Greens MLC John Kaye last year from cancer.

The NSW Greens do not formally appoint a leader but Mr Shoebridge is their longest serving current MP.

Asked about the incident, Ms Leong and Mr Shoebridge declined to comment on party-room discussions.