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Ipomoea alba
''Ipomoea alba'', sometimes called the tropical white morning-glory or moonflower (but not to be confused with the other species also called moonflower) or moon vine, is a species of night-blooming morning glory, native to tropical and subtropical regions of the New World, from northern Argentina north to Mexico and Florida. Though formerly classified as genus ''Calonyction'', species ''aculeatum'', it is now properly assigned to genus ''Ipomoea'', subgenus ''Quamoclit'', section ''Calonyction''.〔(Ars-grin.gov )〕
It is a perennial, herbaceous liana growing to a height of 5-30 m tall with twining stems. The leaves are entire or three-lobed, 5-15 cm long, with a 5-20 cm long stem. The flowers are fragrant, white or pink, and large, 8-14 cm diameter. The flowers open quickly in the evening and last through the night, remaining open until touched by the morning sun. On overcast days, the blossoms may remain open for longer. The flowers also tend to remain open longer during cool temperatures - which may also cause the segments to snag or tear as they open.
The name moonflower derives from their blooming in the evening and their being round in shape like a full moon.
==Historical use==
The Mesoamerican civilizations used the ''Ipomoea alba'' morning glory to convert the latex from the ''Castilla elastica'' tree to produce bouncing rubber balls. The sulfur in this morning glory served to cross-link the rubber, a process predating Charles Goodyear's discovery by at least 3,000 years.〔(MIT.edu )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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