Difference between revisions of "Morning glory"

Revision as of 21:34, 29 January 2008

Morning glory flower

An unopened spiral bud of a morning glory flower

Morning glory is a common name for over 1,000 species of flowering plants in the family Convolvulaceae, belonging to the following genera:

As the name implies, morning glory flowers, which are funnel-shaped, open in the morning, allowing them to be pollinated by hummingbirds, butterflies, bees, and other daytime insects and birds as well as Hawkmoth at dusk for longer blooming variants. The flower typically lasts for a single morning and dies in the afternoon. New flowers bloom each day. The flowers usually start to fade a couple of hours before the petals start showing visible curling. They prefer full sun throughout the day and mesic soils. In cultivation, most are treated as perennial plants in tropical areas and as annual plants in colder climates, but some species tolerate winter cold. Morning glories are a close relative of Moon flowers which open at night to be pollinated by moths.

Cultivation

Ipomoea purpurea in Loganville, Georgia

Morning glory is also called asagao (in Japanese, a compound of 朝 asa "morning" and 顔 kao "face"). A rare brownish-coloured variant known as Danjuro is very popular. It was first known in China for its medicinal uses, due to the laxative properties of its seeds. It was introduced to the Japanese in the 9th century, and they were first to cultivate it as an ornament. During the Edo Period, it became a very popular ornamental flower. Aztec priests in Mexico were also known to use the plant's hallucinogenic properties. (see Rivea corymbosa).

Ancient Mesoamerican civilizations used the morning glory species Ipomoea alba to convert the latex from the Castilla elastica tree and also the guayule plant to produce bouncing rubber balls. The sulfur in the morning glory's juice served to vulcanize the rubber, a process pre-dating Charles Goodyear's discovery by at least 3,000 years.[1]

Because of their fast growth, twining habit, attractive flowers, and tolerance for poor, dry soils, some morning glories are excellent vines for creating summer shade on building walls when trellised, thus keeping the building cooler and reducing heating and cooling costs.

In some places such as Australian bushland morning glories develop thick roots and tend to grow in dense thickets. They can quickly spread by way of long creeping stems. By crowding out, blanketing and smothering other plants, morning glory has turned into a serious invasive weed problem.

Culinary uses

Sweet potato

Ipomoea batatas is the Sweet Potato, a familiar food crop.

Water spinach

Ipomoea aquatica, known as water spinach, water morning-glory, water convolvulus, Ong-Choy, Kang-kung, or swamp cabbage, is popularly used as a green vegetable especially in East and Southeast Asian cuisines. It is a Federal Noxious Weed, however, and technically it is illegal to grow, import, possess, or sell. See: USDA weed factsheet. The fact that it is goes by so many names means that it easily slips through import inspections, and it is often available in Asian or specialty produce markets.

Recreational use

The seeds of many species of morning glory contain ergot alkaloids such as the hallucinogenic ergonovine and the non-hallucinogenic ergine (LSA). Seeds of I. tricolor and I. corymbosa (syn. R. corymbosa) are used as hallucinogens. The seeds can produce similar effect to LSD when taken in the hundreds. Though the chemical LSA is illegal to posess in pure form, the seeds are found in many gardening stores. They should not be taken by people with a history of liver disorders or hepatitis. They should not be taken by pregnant women as they can cause uterine contraction which can lead to miscarriage. Individuals with a history of cardiovascular disease (Heart attack, blood clot, and stroke) or a family history of such problems, and the elderly should avoid consuming these seeds due to their vasoconstrictive effects.[2][3][4]