Weedscan Weed Profiles

WeedScan is a free community weed identification, alert, recording and communication system that supports cooperative weeds action Australia-wide. The weed profiles are being improved, please send feedback to weeds@invasives.com.au

View the Project on GitHub Centre-for-Invasive-Species-Solutions/demo_json_api

Verbenaceae

Stachytarpheta cayennensis

Common Names: Snakeweed Synonyms: Stachytarpheta australis

Plant Form: Subshrub. Size: Up to 1.5 m tall. Stem: Square in cross-section when young. Leaves: Opposite, undivided, egg-shaped to oval, up to 9 cm long, notched to toothed edges, on 1.5 cm long stalks. With densely hairy underside. Flowers: Usually whitish, tubular with five lobes, on long, thin, curved spikes above the mass of leaves. Fruit and Seeds: Up to 6 mm long, dark brown to blackish, splitting into two one-seeded fragments. Habitat: Forests, bushland, roadsides, disturbed areas, streams, gardens, plantations, pastures. Distinguishing Features: Leaf undersides densely hairy, whereas Cayenne snakeweed (Stachytarpheta cayennensis) and Jamaica snakeweed (S. jamaicensis) are hairless or sparsely hairy on veins.

Typical flowers
Leaves
Flowers can be white or pink
Growth habit