Introduced as a lawn species and once used to stabilise soil on banks of irrigation canals and around weirs. Overruns native vegetation, and is capable of suppressing the growth of neighbouring plants.
- Family Verbenaceae
- Origin Americas from California to Argentina and Chile
- Habit Hardy, mat forming, perennial herb with stems that root at nodes.
- Leaves Ovate, with blunt short teeth; 0.5–3 cm long, 2–10 mm wide, without hairs or with short dense hairs; leaf stalk absent or short.
- Flowers Inflorescence a dense short cylindrical to globe-shaped spike of tubular flowers, on a stalk which is 1–6.5 cm long and usually much longer than leaves at the stalk base; petals usually lilac or pink. Flower tubes 2–3 mm long. Spring to late autumn.
- Fruit Ellpisoid to globose, 1.5–2 mm long.
- Roots Dense and mat forming.
- Dispersal Seed and fragments spread by water, humans, contaminated soil (earthmoving equipment, car tyres etc) and garden refuse dumping.
- Control Foliar spray, pasture improvement techniques.
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