Minni ritchi is a type of reddish brown bark

Bark

Bark is the outermost layers of stems and roots of woody plants. Plants with bark include trees, woody vines and shrubs. Bark refers to all the tissues outside of the vascular cambium and is a nontechnical term. It overlays the wood and consists of the inner bark and the outer bark. The inner...

 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

Acacia

Acacia is a genus of shrubs and trees belonging to the subfamily Mimosoideae of the family Fabaceae, first described in Africa by the Swedish botanist Carl Linnaeus in 1773. Many non-Australian species tend to be thorny, whereas the majority of Australian acacias are not...

and Eucalyptus

Eucalyptus

Eucalyptus is a diverse genus of flowering trees in the myrtle family, Myrtaceae. Members of the genus dominate the tree flora of Australia...

have minni ritchi bark. These include:

• Acacia curranii
• Acacia cyperophylla (Creekline Miniritchie)
• Acacia gracillima
• Acacia grasbyi (Miniritchie)
• Acacia monticola
• Acacia trachycarpa
• Eucalyptus caesia
  Eucalyptus caesia
  Eucalyptus caesia, commonly known as Caesia, Gungurru or Silver Princess, is a mallee of the Eucalyptus genus. It is endemic to the central Wheatbelt region of Western Australia, where it is found on a small number of granite outcrops. The name "silver" refers to the white powder that covers the...
  
  (Gungurru, Silver Princess)
• Eucalyptus crucis
• Eucalyptus orbifolia
  Eucalyptus orbifolia
  Eucalyptus orbifolia, commonly known as Round-leaved Mallee, is a tree which occurs in inland areas of the south of Western Australia....