Thereianthus longicollis is a perennial flowering plant and geophyte belonging to the genus Thereianthus and is part of the fynbos.http://redlist.sanbi.org/species.php?species=1546-6 REDLIST Sanbi The species is endemic to the Western Cape and occurs in the mountains between Porterville and Wolseley. The plant is considered rare, it has an area of occurrence of 190 km2.https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:441504-1 Plants of the World Online
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