(Ipomoea alba = Calonyction aculeatum = Ipomoea bona-nox)
Powerful and invasive liana native to warm America, from Mexico and the state of Florida ; To the north of Argentina, and possibly to Uruguay.
Today it is very difficult to specify the original layout as it has invaded wide areas of america (and also the whole world) carried by man as ornamental or to cover railroad slopes.
It is an herbaceous perennial liana up to 5 to 30 meters high.
The leaves are whole or tri-lobed, 5 to 15 centimeters in length.
The flowers are fragrant, white or with pink tint, large, 8 to 14 cm in diameter.
They open quickly in the evening and close during the deeper hours of the night, reopening at sunrise.
It is grown as an ornamental plant for its flowers.
In very cold areas to survive the winter, it grows as an annual plant.
It is propagated by seeds.
These need significant time to soak in water to germinate.
It can be a pest causing problems in agriculture, especially in commercial forestations and fruit growing.
The aborigines of Central America used this species to vulcanize the rubber they made. This process preceded the discovery of Charles Goodyear in at least 3000 years.
(20 December 2008)
Esquina, province of Corrientes, ARGENTINA.