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Job's tears (US) or Job's-tears (UK), scientific name Coix lacryma-jobi, also known as adlay or adlay millet, is a tall grain-bearing perennial tropical plant of the family Poaceae (grass family). It is native to Southeast Asia but elsewhere is cultivated in gardens as an annual. It has been naturalized in the southern United States and the New World tropics. In its native environment it is grown in higher areas where rice and corn do not grow well. Other common names include coixseed, tear grass and Yi Yi (from Chinese 薏苡 yìyǐ). Job's tears are also commonly sold as Chinese pearl barley in Asian supermarkets, although C. lacryma-jobi is not closely related to barley (Hordeum vulgare).
There are two main varieties of the species, one wild and one cultivated. The wild variety, Coix lacryma-jobi var. lacryma-jobi, has hard-shelled pseudocarps—very hard, pearly white, oval structures used as beads for making rosaries, necklaces, and other objects. The cultivated variety Coix lacryma-jobi var. ma-yuen is harvested as a cereal crop, has a soft shell, and is used medicinally in parts of Asia.
The species was named by Carl Linnaeus in 1753 with the epithet as a Latin translation of the metaphorical tear of Job. As of February 2015[update], four varieties are accepted by the World Checklist of Selected Plant Families:
- Coix lacryma-jobi var. lacryma-jobi. Widely distributed throughout the Indian subcontinent to peninsular Malaysia and Taiwan; naturalized elsewhere.
- Coix lacryma-jobi var. ma-yuen (Rom.Caill.) Stapf. South China to peninsular Malaysia and the Philippines.
- Coix lacryma-jobi var. puellarum (Balansa) A.Camus. Assam to Yunnan (China) and Indochina.
- Coix lacryma-jobi var. stenocarpa Oliv.. Eastern Himalayas to Indochina.
Throughout East Asia, Job's tears are available in dried form and cooked as a grain. The grains are generally spherical, with a groove on one end, and polished white in color, though in Japan unpolished yuuki hatomugi, which is unpolished and brown in color, is also available.
In Korea, a thick drink called yulmu cha (율무차, literally "Job's tears tea") is made from powdered Job's tears. A similar drink, called yi ren jiang (薏仁漿), also appears in Chinese cuisine, and is made by simmering whole polished Job's tears in water and sweetening the resulting thin, cloudy liquid with sugar. The grains are usually strained from the liquid but may also be consumed separately or together.
In both Korea and China, distilled liquors are also made from the grain. One such example is the Korean liquor called okroju (옥로주; hanja: 玉露酒), which is made from rice and Job's tears. An ancient Chinese beer recipe included the grain as an ingredient. In Japan, an aged vinegar is made from the grain.
In southern Vietnam, a sweet, cold soup called sâm bổ lượng has Job's tears as one of its ingredients. This dish derives from the southern Chinese tong sui called qīng bǔ liáng (清補涼; Cantonese: ching1 bou2 leung4).
In Cambodia, where it is known as skuay (ស្គួយ), it is used both as part of herbal medicine and as an ingredient in desserts.
It is also used alongside other herbs in traditional Chinese medicine. Particularly Coix lacryma-jobi var. ma-yuen has been used in the traditional Chinese medicine to invigorate the spleen function and promote urination, alleviate arthritis, arrest diarrhea, remove heat and facilitate the drainage of pus.
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