Plants of South Eastern New South Wales

Marrubium vulgare

Flowering stem. Australian Plant Image Index, Mt Ainslie, Canberra, ACT

Flowering stems. Photographer Don Wood, Pinnacle Reserve, ACT

Plants with spent flowers. Photographer Michael Sim, Canberra

Common name

Horehound, White horehound

Family

Lamiaceae

Where found

Woodlands, grassy areas, disturbed sites, and moist places. Sometimes colonizing bare, eroded ground. Widespread.

Notes

Introduced shrub or perennial herb to 1 m tall, sometimes sprawling.  Stems 4-angled, hairy.  Leaves aromatic when rubbed, opposite each other, 1-7 cm long, 8-45 mm wide, hairy, upper surface sometimes becoming hairless, margins toothed to scalloped or irregularly lobed, tips blunt.  Flowers white, 6-12 mm long, 2-lipped, tubular, with five lobes. Calyx tube 4–7 mm long, the lobes reduced to 10 hooked spines. Flowers in dense whorled clusters of 10 or more flowers. Flowers all year.

General Biosecurity Duty all NSW. Noxious weed Vic.

PlantNET description:  http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Marrubium~vulgare (accessed 24 January, 2021)