Prostanthera lasianthos—Victorian Christmas Bush—LAMIACEAE.

Prostanthera lasianthos

Link to Images on Flickr.

Habitat— Grows in Rainforest, Sclerophyll Forest, and Subalpine Woodland, mainly along watercourses and in moist gullies.

Distribution—North from Tasmania, through Victoria and New South Wales.

Description— Shrub to small tree, usually 1 to 6 m high, aromatic; branches glabrous or sparsely covered with short, curled hairs and ± sessile glands. This species is morphologically variable, and a number of informal variants can be recognized. Populations growing at higher altitudes, particularly on exposed sites, tend to have reduced leaf size and/or number of teeth on leaf margin. This one being the Typical variant.

Local occurrences

Barrington/Gloucester Tops and Waitui Falls.

Leaves.— Simple, opposite, toothed or sometimes entire, stipules absent, mostly hairless with surface glands, Lamina ovate or rarely ± narrow-ovate, usually 40 to 120 mm long, 10 to 32 mm wide, apex acute to acuminate; base cuneate to shortly attenuate, slightly oblique; margins usually ± toothed; upper surface dark green, lower surface paler, glabrous; petiole 6 to 10 mm long.

Prostanthera lasianthos
Prostanthera lasianthos

Inflorescence.—In a terminal botryoid, branched—botryoid or panicle; bracteoles persistent, 2 to 4 mm long. Calyx 4 to 5 mm long; tube 2 to 3 mm long; upper lobe 1.5 to 3 mm long, enlarged in fruit. Corolla 10 to 15 mm long, white to pale mauve with purple spots in throat. Anthers with appendage c. 1.5 mm long.

Flowering.—November to March.