jump to navigation

Mintweed (Horehound)

Mintweed – Hyptis suaveolens

Habit: Annual herb becoming woody, growing 1-3m. Strong mint smell and tiny blue to purple flowers..

Spread: Attach to animals and people and spread by slashers and muddy tyres.

Mintweed infest3

Mintweed can grow as both an annual and perennial. Mostly, it dies off in the late dry season and pops back up over the wet.

The photo above has been taken along a bush track just outside of Broome. This type of infestation is typical of mintweed. The seeds are spread along tracks via vehicles and animals and once established the plants continue to infiltrate further into the bush. People have noticed a significant increase in the density and distribution of this plant over the last ten years. Unfortunately it can be spotted in many places where stock and people have created a disturbance. For example, the SKIPA trip up the Millie Windi track in May 2008 found this plant growing along most of the roadside and camping areas.


Mintweed has tiny blue to purple flowers generally found in clusters. The seeds become enclosed in a spiny calyx. This assists them to attach to animals, people (and swags!) and machinery and disperse into new areas.

Hyptis flower

A close up of the flower. They are only up to 7mm long so I doubt you would be looking at them this closely!

Mintweed leaves

When crushed or walked on the leaves give off a strong minty smell. Even prior to flowering the plants can be easily identified by this feature and their distinctive leaves. Mintweed can grow to 3m tall.


No comments yet — be the first.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: