白菜

Bok choy is a direct phonetic borrowing of the Cantonese pronunciation of 白菜 — baak choi — meaning 'white vegetable.' In Mandarin the same characters are read bái cài. The name refers to the white stalks of the plant (Brassica rapa subsp. chinensis), distinguishing this variety from other Chinese leafy vegetables. Bok choy belongs to the same species as turnip, napa cabbage, and several other Asian brassicas, but this subspecies — characterized by thick white stalks and dark green leaves that do not form a head — is the one Chinese-speaking immigrants brought to the United States and that entered English as 'bok choy.' The word appears in English-language texts by the late nineteenth century, initially in records of Chinese markets in San Francisco.

The plant has been cultivated in China for at least fifteen hundred years. It is one of the most important vegetables in Chinese cuisine, particularly in Cantonese cooking, where its clean flavor and quick-cooking properties make it a staple stir-fry ingredient and a standard accompaniment to congee, noodle soups, and roasted meats. Bok choy thrives in cool weather and can be harvested young (as baby bok choy, a term that emerged later in American markets) or at full maturity. In Hong Kong, Guangdong, and among Cantonese diaspora communities worldwide, baak choi is as ordinary as cabbage is in Germany — a daily vegetable, unmarked by exoticism.

In the United States, bok choy arrived with the first waves of Chinese immigration in the 1840s and 1850s, when miners and laborers came to California during the Gold Rush. Chinese immigrants established market gardens in California's Central Valley and in urban Chinatowns, growing familiar vegetables for their communities. Bok choy was among the crops cultivated in these gardens, and over time it became available beyond Chinese markets as non-Chinese Americans encountered Chinese cuisine. The Cantonese name moved with the vegetable into mainstream American grocery vocabulary.

The late twentieth century completed bok choy's transition from ethnic specialty to mainstream ingredient. The proliferation of Chinese restaurants, the growth of Asian-American communities, and the food media's embrace of Asian cuisines made bok choy familiar to American home cooks. It appeared in celebrity chef recipes, in supermarket produce sections, and in meal kit services. Today bok choy is one of the most widely available Chinese vegetables in Western supermarkets, its Cantonese name unchanged, its origins largely unexamined.