Common name: cut-leaved mint-bush
Prostanthera incisa R.Br. APNI*
Synonyms: Prostanthera incisa var. pubescens F.Muell. ex Benth. APNI*
Prostanthera incisa var. sieberi (Benth.) C.Moore & Betche APNI*
Prostanthera sieberi Benth. APNI*
Description: Erect, openly branched shrub, 0.5–3 m high, 2–3 m diam., strongly and unpleasantly aromatic; branches laterally ridged, moderately to densely covered with short, curled hairs, densely covered with ± sessile glands.
Leaves with lamina ovate, narrow-ovate to oblong, 8–30 mm long, 4–12 mm wide; apex obtuse; base ± attenuate and decurrent; margins coarsely toothed with teeth directed forward to laterally; surfaces green, lower surface paler, covered with short, curled hairs basally, densely covered with ± sessile glands; petiole 1–10 mm long.
Flowers in a terminal leafy and/or bracteate botryoid; bracteoles not persistent, c. 1 mm long. Calyx 3–4.5 mm long; tube c. 2 mm long; upper lobe c. 2 mm long, slightly enlarged in fruit. Corolla 7–10 mm long, pale mauve to mauve. Anthers with appendage absent, each loculus with a tuft of basal hairs.
Distribution and occurrence: Grows in wet sclerophyll forest and on margins of rainforest; from Mt Warning to Ulladulla district.
NSW subdivisions: NC, CC, SC, NT, CT
Other Australian states: Vic.
There appears to be no reliable characters to distinguish between P. incisa s. str.i and P. sieberi s. stri. Further studies are required to resolve this species complex.
Text by B. J. Conn
Taxon concept: Flora of NSW 3 (1992)
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