Rubber vine

Image is Cryptostegia madagascariensis not grandiflora
Flowers and leaves of Rubber Vine
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Eudicots
(unranked):	Asterids
Order:	Gentianales
Family:	Apocynaceae
Genus:	Cryptostegia
Species:	C. grandiflora
Binomial name
Cryptostegia grandiflora R. Br.

Cryptostegia grandiflora, commonly known as rubber vine, is a woody-perennial vine that is native to south-west Madagascar. It is also a significant weed in northern Australia, sometimes regarded as the worst weed in all of Australia. It has also been introduced to most other tropical and subtropical regions by man, because of its attractive flowers and the fact that its latex contains commercial quality rubber (hence the name). It is now naturalised in the Caribbean, East Africa, Mauritius, India, Southeast Asia, Indonesia, Latin America, the southern United States, Fiji and New Caledonia.

Seeds germinate after the first rains of the wet season, but growth does not become rapid until well after the wet season begins. However, if enough water is available, rubber vine can grow as much as five metres in one month. Flowering usually occurs after the wet season ends, along with fruit set. In the West Kimberley, plant growth accelerates before the first rains come, stimulated by higher pre-wet season humidity and flowering occurs early and during the wet season. It is usual to find both mature and immature fruit on rubber vine at any one time.

Rubber vine seeds are dispersed by winds and flooding. This is particularly important in Australia where very large river floods can occur.

The primary and initial dispersal dynamic is gravity, with the vast majority of seeds falling and germinating within metres of the parent vine. Aerial dispersal is an interplay between gravity and temporal wind and vertical air currents. Evidence shows individual seed dispersal as far as ten kilometres. It would not be unexpected to have distances far greater. Water dispersal by flood episodes is far less than commonly believed. Early rains prior to full flood episodes, typically result in germination, thus anchoring seedling against subsequent water flows.

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Wikipedia