Minni ritchi is a type of reddish brown bark that continuously peels in small curly flakes, leaving the tree looking like it has a coat of red curly hair. Brooker and Kleinig (1990) formally described it as a bark type in which "the outer rich, red-brown smooth bark splits both longitudinally and horizontally, the free edges rolling back without completely detaching to expose new green bark beneath".
A number of species of Acacia and Eucalyptus have minni ritchi bark. These include:
- Acacia curranii
- Acacia cyperophylla (Creekline Miniritchie)
- Acacia gracillima
- Acacia grasbyi (Miniritchie)
- Acacia monticola
- Acacia trachycarpa
- Eucalyptus caesia (Gungurru, Silver Princess)
- Eucalyptus crucis
- Eucalyptus orbifolia