Cyamopsis is a genus of the family Fabaceae. Its species are distributed across sub-Saharan Africa (southwestern Africa and the Sudanian and Somali-Masai regions), Saudi Arabia, Pakistan, and India. Typical habitats include tropical seasonally-dry thorn scrub and grassland, often in floodplains, stream beds, and pans, and in open sandy or rocky ...

The guar (from Persian: گوآر : gvār) or cluster bean, with the botanical name Cyamopsis tetragonoloba, is an annual legume and the source of guar gum. It is also known as gavar, gawar, or guvar bean. The genus name Cyamopsis means bean-like (from Greek: κύαμος : kýamos "bean" + Greek: ὄψις : ópsis "view').

瓜儿豆（ Cyamopsis tetragonoloba (L.) Taub.）是豆科瓜儿豆属植物。一年生草本，高0.6-3米。茎直立，有分枝，基部木质化，几无毛，分枝明显具四棱。羽状三出复叶；具长柄。总状花序腋生，长4-6厘米，有花6-30朵。

瓜尔（學名： Cyamopsis tetragonoloba 、 Guar ），是一年生 豆科植物并且是瓜尔豆胶（關華豆膠）的原材料。其最适合生长在多雨的环境下。但也容忍干燥的条件。在印度的产量约占世界产量的80%，然而，由于强烈的需求，该植物也被引入到新的地区。

Cyamopsis serrata grows wild in southwestern Africa, Botswana, and S. Africa while C. dentata grows wild in Rhodesia, Angola, southwestern Africa, and S. Africa (Whistler and Hymowitz, 1979). Many populations of these wild guar species may be susceptible to decline due to human encroachment and drought.

2021年12月15日 · Comparison of morphological and phytochemical characteristics in guar (Cyamopsis tetragonoloba L.) landraces and cultivars under different sowing dates in an arid environment

2016年6月20日 · Guar or clusterbean (Cyamopsis tetragonoloba L.) is a drought and salinity tolerant [4] - [6] summer annual legume. Guar increases N and organic matter content of soil by fixing atmospheric nitrogen and adding plant residues, respectively [7] [8] .

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Guar (Cyamopsis tetragonoloba L.), also referred to as clusterbean, is a drought tolerant crop that is typically grown on sandy loam soils under hot and dry conditions [4]. Guar can be grown for forage, for fresh beans, or for seeds that are used to produce guar gum.

More bush than tree, Cyamopsis tetragonoloba, thrives in hot, dry climates and sandy soils. In India, there are several varieties of guar that differ from each other in plant height, shape, and pod size. Most of the world's guar is grown in northwestern India, Pakistan, and the US.