The division in the NSW Greens party room has worsened, with Ballina MP Tamara Smith telling her colleague Jeremy Buckingham that a speech made in Parliament calling for his resignation was "claptrap".

In a text message sent to Mr Buckingham, Ms Smith said she was "sorry that things have gone this way" and that she publicly condemned him because she felt compelled to support other women in the party.

Jeremy Buckingham is facing pressure to resign. Credit:Simone De Peak

Greens' Newtown MP Jenny Leong last week used parliamentary privilege to call on Mr Buckingham to quit Parliament amid allegations of "sexual violence" against a former party employee.

She also said that Mr Buckingham's poor behaviour on other occasions, while not sexual, also meant he should no longer have a place in the party or the upper house.