Lablab

Hyacinth Bean ( Lablab purpureus )

The Hyacinth Bean ( Lablab purpureus ), also Indian Bean or Egyptian Bean, Hyacinth Bean, formerly called Fasel bean, is the only species of the genus in the subfamily Papilionaceae Lablab ( Faboideae ) within the legume family ( Fabaceae or Leguminosae). This crop is closely related to a number of other beans called crops.

Dissemination

The Hyacinth Bean has either originated in northeastern Africa or in India. It requires high temperatures (> 20 ° C), but relatively little water. It does not tolerate waterlogging.

Description

The Hyacinth Bean is a rapidly proliferating, semi- erect to climbing herbaceous plant ( in temperate climates usually around 2 m) climbs up to 10 m wide. It is perennial, but usually grown as an annual plant, because they, like most beans can not tolerate frost. It forms a strong, up to 2 m deep taproot. The stems are often very hairy. The change-constant leaves are stalked and three parts. The stipules are bent back.

At an axillary, to 20 cm long stem are racemose inflorescences. The fragrant flowers are zygomorphic and hermaphroditic. The sepals are fused. The calyx is bilabiate; the upper calyx lip is not divided, the lower is three-lobed. The petals are pink to purple or white. The single carpel contains several ovules. Flowering starts in Europe in June.

The purple legumes are about 20 cm long and contain many seeds. The egg-shaped seeds are good 1 cm long and 0.5 cm thick. The mottled, marbled or solid color seeds are white on red-brown to black. The thousand-seed weight is 140-600 grams.

Seeds and pods are poisonous raw, as they contain cyanogenic glycosides. The toxin is destroyed by cooking.

Use

The uses of the bean Fasel are many: You can eat cooked immature pods and seeds, and the seeds ripen. The plant is also used as a ground cover and foundation for soil improvement.

In Europe, it is also like as a screen and because of their fragrant purple flowers, as an ornamental plant for Beranken of fences utilized.

Leaves and stems are used in the tropics as hay.

System

The genus belongs to the subtribe Lablab Phaseolinae the tribe Phaseoleae in the subfamily Fabaceae ( Faboideae ) within the legume family ( Fabaceae ).

The genus name Lablab was published in 1763 by Michel Adanson in Familles des plantes, 2:325. The first description of the kind took place in 1753 under the name Dolichos lablab by Carl Linnaeus in Sp Pl, 725

Synonyms of Lablab purpureus (L.) Sweet are: Dolichos lablab, Lablab niger Medik, Lablab lablab (L.) Lyons, Vigna aristata Piper, Lablab vulgaris (L.) Savi ...

Lablab purpureus From (L.) Sweet, there are two subspecies:

• Lablab purpureus subsp. bengalensis ( Jacq. ) Verdc. ( Syn. Dolichos Jacq bengalensis, Dolichos lablab subsp bengalensis ( Jacq. ) Rivals, Lablab niger subsp bengalensis ( Jacq. ) Cuf. .. . )
• Lablab purpureus (L.) Sweet subsp. purpureus