Choy sum Choy sum Choy sum (also spelled choi sum or "Cai Xin" in modern Pinyin) is a leafy vegetable commonly used in Chinese cuisine. It is a member of the genus "Brassica" of the mustard family, Brassicaceae ("Brassica rapa" var. "parachinensis" or "Brassica chinensis" var. "parachinensis"). Choy sum is a transliteration of the Cantonese name (), which can be literally translated as "heart of the vegetable". It is also known as Chinese Flowering Cabbage. Choy sum is a green leafy vegetable similar to gai lan, and can be characterized by the distinct yellow flowers which it bears. Each flower has four
Bok Tower Gardens includes her personal communications, photographs, manuscript writings, and family possessions. The American Foundation Collection includes newspaper scrapbooks, meeting minutes, publications, and other manuscript materials. The Edward Bok Newspaper Scrapbook Collection is made up of 42 bound scrapbooks filled with newspaper clippings about Bok's publications and charitable acts. Access to the collections in the Chao Research Center Archives is available by appointment only. To make an appointment the Bok Tower Librarian should be contacted. The Pinewood Estate Mansion holds furniture, ceramics and other objects that were kept in the house before Bok Tower purchased it in 1970. Other collections held at