Brassica alba yields white mustard seeds; Brassica nigra, black mustard seeds.

白质芸苔生产白色芥茉籽，黑质芸苔生产黑色芥茉籽。

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In small skillet add remaining ghee. When hot add cumin seeds and black mustard seeds. When the seeds start to crackle pour the mixture into the pot of dal.

用小锅加入剩下的提纯奶油，加热后加入孜然籽和黑芥末子，当它们开始有爆裂噼啪声时一起倒入豆羹之中搅匀。

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The seeds can come from three different plants: black mustard , brown Indian mustard and white or yellow mustard.

芥菜籽来源于三种不同的植物：黑芥末，褐色印度芥末和白色或者黄色芥末。

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