75-85 day maturity. Lactuca sativa var. asparagina ‘Purple Taiwan Sword Celtuce’. Purple Taiwan Sword Celtuce Lettuce Seeds. Non-GMO, cool-season annual heirloom. This variety of Chinese stem lettuce is perfect for home gardeners. Chinese stem lettuce originated in southern China and came to the U.S. in the 1800s. It is grown for the stalks and leaves, which are crispy and delicious. In Taiwan, Pointed Taiwan Sword Celtuce referred to as a choy, is very popular as a vegetable. Approx. 22,000 seeds / oz.