"The is cultivated in the cooler and more mountainous regions of Asia and to some extent in Canada and Maine. It is recommended for its superior hardiness. ... The grain is smaller than the common buckwheat, the plants are more slender and the leaves arrow-shaped. It is sometimes called India wheat and duckwheat. The true buckwheat has bright, white or pink-tinged flowers in large trusses or heads; the India wheat has smaller greenish white flowers in small heads, and also small leaves. ... The common buckwheat (') is the most valuable and most widely grown form. It is met with wild in China and Siberia and enters into the agriculture of every country where grain crops are cultivated. In China it has been grown and used for food from time immemorial. In Japan it is held in general esteem and in Russia it is also largely consumed. It has been cultivated for centuries in England, France, Spain, Italy and Germany."