Rubber Vine

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Cryptostegia grandiflora

Description

This is a robust woody perennial climbing vine growing to 2 metres unsupported or up to 30 metres in trees. The stems, leaves and seed pods have a milky sap when broken or cut.

Leaves are smooth, glossy dark green with a purple mid-rib. They are 6 to 10 centimetres long and 3 to 5 centimetres wide. They sit in opposite pairs along the stem.

Flowers are large and showy. They have 5 white to light purple petals arranged in a funnel shape. It flowers all year round.

Seed pods have many seeds with long, white silky hairs. They are rigid and grow in pairs at the end of a short stalk. They are 10 to 12 centimetres long by 3 to 4 centimetres wide.

Habitat it is found in creek and river systems, and adjacent hillsides and pastures. It prefers areas where annual rainfall is 400 to 1,400 millimetres and is well adapted to a monsoonal climate.

Weed characteristics it invades and smothers riparian vegetation and forms dense, sometimes impenetrable thickets. It also creates a habitat for feral animals. This species is poisonous to stock.

Dispersal seeds are scattered by wind and water.

Declaration Details

This species is a Class 2 declared plant under Queensland legislation and is listed as a Weed of National Significance.

How to act

Burning is highly effective in areas away from fire sensitive native vegetation. Biological control agents assist by defoliating the plants and promoting grass growth for better fire management. Basal barking or cut stump methods can be employed in environmentally sensitive areas. Care should be taken to minimise off target species impacts. Mechanical removal can be effective if the roots can be disturbed.

Refer to Weed Control Methods.

References

Related information

Rubber Vine © NQ Dry Tropics 2011
Rubber Vine
Rubber Vine
Rubber Vine © NQ Dry Tropics 2011

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