Pyrenula largei is a species of lichen in the family Pyrenulaceae. It was first described in 2025 by Andrew J. Marshall, Peter de Lange, Dan Blanchon and André Aptroot. The species is endemic to New Zealand, found in both the North Island and the South Island.
The species is corticolous, possessing a crustose thallus with no pseudocyphellae, and is grey-brown to umber in colour. It can be distinguished from other members of Pyrenula by its 10âÂÂ18-transversely septate ascospores, which measure between by and by , as well as ascomata which measure up to in diameter.
This species was first described by Andrew J. Marshall, Peter de Lange, Dan Blanchon, and André Aptroot in 2025. P. largei was named after New Zealand botanist Mark F. Large. The holotype is held by the Unitec Institute of Technology herbarium.
Pyrenula largei inhabits a range of environments depending on its location. In the Far North District, the lichen grows exclusively on the bark of tÃÂnekaha trees in kauri-dominated forests. On Little Barrier Island, however, it has been found in colonies of various Pyrenula species growing on Myrsine within kÃÂnuka-dominated forest.
The species is endemic to New Zealand, occurring between Te Paki in the Far North District to Secretary Island in Fiordland.