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Name

Snakeweeds

Weed Habitat 

  • Snakeweeds invade disturbed areas e.g. creek lines and roadsides.
  • Invades monsoon vine forests where soil has been disturbed by pigs.
  • Can invade overgrazed pastures.

Description 

  • Perennial shrubs to 2 m high with tough stems and a woody rootstock.
  • Young stems somewhat quadrangular.
  • Leaves opposite, shallow-toothed.
  • Flowers with 5 petals in stiff curved spikes from the top of the branches.
  1. Stachytarpheta mutabilis - Lower leaf surfaces, rachis (Main axis of flower head) and calyx hairy, flowers pink to red.
  2. Stachytarpheta cayennensis - Lower leaf surfaces, rachis and calyx hairless, rachis slender, leaves membranous, flowers blue to almost white.
  3. Stachytarpheta jamaicensis - Lower leaf surface, rachis and calyx hairless, rachis stout, leaves fleshy, flowers mauve, blue, violet or purple.

Stachytarpheta cayennensisStachytarpheta jamaicensisStachytarpheta jamaicensis

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Plant Type
Leaf Arrangement
Other weed identifiers
Plant Life Cycle
Weed Declaration
Currently not declared however under the Biosecurity Act 2014 you still have an obligation to prevent or minimise a biosecurity risk posed by a pest.
Weed Spread