2. keel, alias fenugreek and Caiyunge, many people think it is a cactus plant, but it is actually a succulent plant of Euphorbiaceae and Euphorbia. The keel is shaped like a columnar cactus, 2 to 3 meters high, with an upright stem with 3 to 4 edges and beautiful markings. There are thorns, a few branches, and they are also upright. The leaves are 2 cm to 4 cm long. Easier to reproduce, just cut. The alias of keel is: Lady Enforcers (Collection of Lingnan Herbs); Epiphyllum (Flora of Guangzhou); Seven-star sword flower and dragon bone flower (Guangdong traditional Chinese medicine II); Overlord (Manual of Chinese Herbal Medicine Commonly Used by Guangzhou Air Force).