Prostanthera calycina
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Prostanthera calycina, the West Coast mintbush, limestone mintbush or red mintbush,[1] is a species of flowering plant that is endemic to the Eyre Peninsula in South Australia. It is a small, more or less prostrate shrub with aromatic, elliptic to oblong leaves and red flowers.
Description
Prostanthera calycina is a more or less prostrate shrub that typically grows to a height of about Template:Cvt and has more or less cylindrical, hairy branches. The leaves are well-spaced along the branchlets, elliptic to oblong, Template:Cvt long and Template:Cvt wide on a densely hairy petiole Template:Cvt long. The leaves are strongly aromatic when crushed. The flowers are arranged singly in leaf axils on a hairy pedicel Template:Cvt long. The sepals are Template:Cvt long forming a tube Template:Cvt long with two lobes Template:Cvt long and Template:Cvt wide. The petals are Template:Cvt long forming a tube Template:Cvt long with two lips. The middle lobe on the lower lip is about Template:Cvt long and Template:Cvt wide, the side lobes about Template:Cvt long. The upper lip has two lobes about Template:Cvt long and joined but with a small notch between them. Flowering occurs between September and December.[2][3][4]
Taxonomy
Prostanthera calycina was first formally described in 1870 by George Bentham from an unpublished description by Ferdinand von Mueller and the description was published in Flora Australiensis.[5][6]
Distribution and habitat
West coast mintbush is only known from the Eyre Peninsula in South Australia where it usually grows on limestone outcrops in mallee vegetation.[4]
Conservation status
West coast mintbush is classified as "vulnerable" under the Australian Government Environment Protection and Biodiversity Conservation Act 1999 and the South Australian Government National Parks and Wildlife Act 1972. The main threats to the species include grazing, habitat fragmentation and road maintenance.[4]
Use in horticulture
This mintbush is easily propagated from cuttings or by grafting onto Prostanthera nivea and grows best in dry climates in well drained soil.[4][7]
References
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