Clump-forming perennial herb < 2.5 m tall, < 4 m wide. Rhizomes are stout. Leaves are very large and prickly. Flowers are minute and borne on dense, closely branched conical panicles < 1 m long. Drupes contain a single ovoid, flanged seed.
To help protect our environment, from 1 September 2021, you:
Riparian margins, wetlands, coastal areas, cliffs.
Sets seed. Vegetative spread from rhizome fragments.
Competes with native vegetation and prevents native seedling establishment. Reduces native biodiversity in riparian margins, wetlands, coastal areas and cliffs.
Follow up treated areas 3 times per year. Encourage natural regeneration of native plants or replant treated areas where possible after 2-3 treatments to establish dense ground cover and minimise reinvasion.
CAUTION: When using any herbicide or pesticide please read the label thoroughly to ensure that all instructions and safety requirements are followed.
G. tinctoria is a smaller plant. The inflorescence is shorter and more compact. Another difference is between scales which are found at the base of the leaves and inflorescence. In G. manicata there is a prominent development of membranous "webbing" between the main lobes of the scale whereas in G. tinctoria this is not well developed and so the lobes are often almost free to the main rachis of the scale.