Correa calycina is a tall shrub which is endemic to South Australia

South Australia

South Australia is a state of Australia in the southern central part of the country. It covers some of the most arid parts of the continent; with a total land area of , it is the fourth largest of Australia's six states and two territories.South Australia shares borders with all of the mainland...

. It grows to between 1 and 3 metres in height and 1 to 2 metres wide. The leaves are glabrous to tomentose

Tomentose

Tomentose is a term used to describe plant hairs that are flattened and matted, forming a woolly coating known as tomentum. Often the hairs are silver or gray-colored...

 and are 2 to 4 cm long and 1 to 2.5 cm wide. The flowers are produced between April and September in their native range. These are green, sometimes maturing to mauve.

Taxonomy

The species was first formally described in 1925 by J.M. Black in Transactions and Proceedings of the Royal Society of South Australia.

There are two varieties which are currently recognised:

• Correa calycina J.M.Black var. calycina (Hindmarsh Correa) which is listed as a "vulnerable species" under South Australia's National Parks and Wildlife Act (1972).
• Correa calycina var. halmaturorum Paul G.Wilson (De Mole River Correa)) which was first formally described by Paul G. Wilson in the journal Nuytsia
  Nuytsia (journal)
  Nuytsia is a peer-reviewed journal published by the Western Australian Herbarium. It publishes papers on systematic botany, giving preference to papers related to the flora of Western Australia. Nearly twenty percent of Western Australia's plant taxa have been published in Nuytsia. First published...
  
  in 1998.