Kingdom: Fungi
Phylum:: Ascomycota
Subphylum: Pezizomycotina
Class: Dothideomycetes
Subclass: Dothideomycetidae
Order: Capnodiales
Family: Mycosphaerellaceae
Genus: Mycosphaerella
Species: M. pittospori
Binomial name: Mycosphaerella pittospori
Synonym: Sphaerella pittospori
Common name: Lemonwood leaf spot.

Mycosphaerella pittospori is a fungus forming wine red coloured spots on the leaves of Pittosporum eugenioides (lemonwood/tarata). It has been reported from Southland, Taranaki, Coromandel and Northland. It usually affects the lower leaves.  

The top surface of the leaves.
Mycosphaerella pittospori Lemonwood leaf spot .JPG  

The underside of the same leaves.
Mycosphaerella pittospori Lemonwood leaf spot -001.JPG 

Mycosphaerella pittospori Lemonwood leaf spot -002.JPGMycosphaerella pittospori Lemonwood leaf spot -002.JPG  

The next two photos are of the same spot on different sides of the same leaf.
Mycosphaerella pittospori Lemonwood leaf spot -003.JPG  

Mycosphaerella pittospori Lemonwood leaf spot -004.JPG 

Thanks to Wikipedia for text and information: https://creativecommons.org/licenses/by-sa/3.0/