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Prostanthera incisa
Prostanthera incisa, commonly known as cut-leaf mint-bush or native thyme, is a species of flowering plant in the family Lamiaceae and is endemic to south-eastern continental Australia. It is an erect, strongly aromatic, openly branched shrub with hairy, densely glandular branches, egg-shaped to oblong leaves, and pale mauve to mauve flowers.
First grown in England in 1824, P. incisa var. incisa is cultivated on a small-scale commercial basis for essential oil production and for bushfood spice. P. incisa prefers sheltered sites in well-drained acidic soils, and in poorly drained soils it can be susceptible to root-rot. It has reasonable frost tolerance down to −5 °. It is a fast-growing shrub, and consequently can be harvested within the first year. When pruned back to a height of 50 cm it reshoots readily.
Propagation is by seed or cutting material of firm young growth.
Cut-leaved mint-bush is found along the New South Wales coastline from Mount Warning near the Queensland border all the way to Victoria, as well as on the Central Tablelands of New South Wales. It is found in sheltered sites in rainforest margins or sclerophyll forest under such trees as Sydney blue gum (Eucalyptus saligna), cabbage gum (E. amplifolia), Sydney peppermint (E. piperita), red bloodwood (Corymbia gummifera) or turpentine (Syncarpia glomulifera). It can also occur in scrub along watercourses in association with river she-oak (Casuarina cunninghamiana).
Prostanthera albiflora · Prostanthera albohirta · Prostanthera althoferi · Sand Mintbush · Prostanthera arapilensis · Tranquility Mintbush · Scarlet Mintbush · Prostanthera athertoniana · Prostanthera baxteri · Downy Mintbush · Lilac Mint Bush · Limestone Mintbush
Text excerpted from the Wikipedia article Prostanthera incisa by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
