Bok choy
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Bok_choy".

Chinese cabbage
Brassica rapa chinensis, called "bok choy" in the United States
Species
Brassica rapa
Cultivar group
Chinensis, Pekinensis groups
Origin
China, before the 15th Century
Cultivar group members
many, see text

Chinese cabbage (Brassica rapa subspecies, see below) is a Chinese leaf vegetable commonly used in Chinese cuisine. The vegetable is related to the Western cabbage and of the same species as the common turnip. There are many variations on its name, spelling, and scientific classification.

History

Chinese cabbage has been cultivated for over six thousand years in China. Brassica rapa seeds have been found in jars in the excavated New Stone Age settlement of Banpo. They were a common part of the diet in southern China by the 5th century.

The Ming Dynasty pharmacologist Li Shizhen studied the Chinese cabbage for its medicinal qualities. Before this time the Chinese cabbage was largely confined to the Yangtze River Delta region. The Chinese cabbage as it is known today is very similar to a variant bred in Zhejiang around the 14th century. During the following centuries, it became popular in northern China and the northern harvest soon exceeded the southern one. Northern cabbages were exported along the Grand Canal to Zhejiang and as far south as Guangdong.

They were introduced to Korea, where it became the staple vegetable for making kimchi. In the early 20th century, it was taken to Japan by returning soldiers who had fought in China during the Russo-Japanese War. At present, the Chinese cabbage is quite commonly found in markets throughout the world.

Varieties

There are two distinctly different groups of Brassica rapa used as leaf vegetables in China, and a wide range of varieties within these two groups. The binomial name B. campestris is also used.

Pekinensis

This group is the more common of the two, especially outside Asia; names such as da baicai (lit. "large white vegetable"); Baguio pechay or pechay wombok (Tagalog); Chinese white cabbage; baechu (Korean), wongbok, nappa, or napa cabbage; and hakusai (Japanese: 白菜) usually refer to members of this group. Pekinensis cabbages have broad green leaves with white petioles, tightly wrapped in a cylindrical formation and usually, but not necessarily, forming a compact head. As the group name indicates, this is particularly popular in northern China around Beijing (Peking).

Chinensis

This group was originally classified as its own species under the name B. chinensis by Linnaeus. When used in English, the name Bok choy or Pak choi typically refers to Chinensis. Smaller in size, the Mandarin term xiao baicai ("small white vegetable") as well as the descriptive English names Chinese chard, Chinese mustard, celery mustard, and spoon cabbage are also employed. Chinensis varieties do not form heads; instead, they have smooth, dark green leaf blades forming a cluster reminiscent of mustard or celery. Chinensis varieties are popular in southern China and South-East Asia. Being winter-hardy, they are increasingly grown in Northern Europe.

Commercial variants of Chinensis include:

• Choy sum (Chinese: 菜心; pinyin: càixīn; literally "vegetable heart"; Hokkien chai sim): Also called yu cai,(Chinese: 油菜; pinyin: yoú cài; literally "oil vegetable"), this brassica refers to a small, delicate version of pak choi. In appearance it is more similar to rapini, or broccoli rabe, than the typical pak choi. "Choy sum" is sometimes used to describe the stem of any Chinese cabbage or the heart of Shanghai pak choi.
• Shanghai pak choi (Chinese: 上海白菜; pinyin: Shànghǎi báicài; Japanese: 青梗菜, chingensai) refers to dark green varieties where the varioles are also green. It is probably the most common vegetable in Shanghai, where it is simply called qingcai (青菜; literally "blue/green vegetable") or qingjiangcai (青江菜; literally "blue/green river vegetable").

Nomenclature

In Mandarin Chinese bai cai (白菜, or "white vegetable") refers to both groups of B. rapa. However, the English word bok choy and its variations bok choi and pak choi are derived from the Cantonese cognate, which instead denotes one specific variety of cabbage, namely those with white stems and dark green leaves. The other varieties all have different names which entered the English language as you choy, choy sum, napa (from 黃芽白, Cantonese name for 天津白菜 or 肇菜) and baby bok choy, etc. Hence the English word bok choy (and its Cantonese source) is not equivalent to the Mandarin word bai cai, though the Chinese characters are the same.

See also

• Kai-lan (Chinese broccoli)
• Kimchi

Gallery

This article contains Chinese text. Without proper rendering support, you may see question marks, boxes, or other symbols instead of Chinese characters.

Bok choy's yellow flowers

External links

Wikibooks Cookbook has an article on

Bok Choy

• Nutritional information on bok choy (with photo of chinensis variety)
• Multilingual taxonomical information from the University of Melbourne
• How to choose, store and use pak choi from Veg Box Recipes