Spinifex may refer to:

• Spinifex, a genus of grass
• Spinifex, Triodia, a hummock grass of arid Australia, covering twenty per cent of the Australian continent. Spinifex is a genus of coastal grasses Unlike the plants of the related genus Triodia, Spinifex species are found only in wet habitats Triodia is a large genus of hummock-forming grass endemic to Australia they are commonly known as spinifex, although they are not a part of Although not technically Spinifex, it is commonly referred to as such.
• Spinifex is also used in reference to a rock texture in certain ultramafic lavas such as komatiite. Rock microstructure includes the texture of a rock and the small scale rock structures Ultramafic (also referred to as ultrabasic) rocks are igneous and meta -igneous rocks with very low Silica content (less than 45% generally Komatiites are Ultramafic mantle-derived Volcanic rocks They have low SiO2 low K2O low Al2O3 and high to extremely high
• Spinifex Pigeon, a bird found in Australia

The Spinifex Pigeon, Geophaps plumifera, is a bird found in Australia.

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