The keel flower, also known as the "measurement ruler", is a climbing succulent shrub of the cactus family, with a long growth cycle.

The keel flower likes a warm, moist and semi-shade environment. It is resistant to drought and is afraid of low-temperature frost. The winter overwintering temperature must not be lower than 7 °C, otherwise it is susceptible to freezing damage. The soil is rich in humus and sandy soil is best. It is 3-15 meters long and has air roots. Guangdong, Hainan, Guangxi and other regions can be cultivated in dry gardens or near villages, often climbing on tree trunks, waste walls or rocks; their stems are often used as grafting rootstocks for various cacti.

The keel flower is planted in the corner and edge of the greenhouse and can be used as a fence plant, and the potted plant can be used as a rootstock for grafting other cactus plants. Distributed from Central America to northern South America, widely cultivated all over the world, wild in Hawaii: commonly cultivated in various parts of China using aerial roots to climb on tree trunks, rocks or walls.

The keel flower is a plant of the cactus family. Keel flower climbing succulent shrub, 3-15 m long, ridges often wing-like, margin wavy or crenate, dark green to light blue-green, glabrous, old branches often bulging at the edges, light brown, bony; Arranged along the edges, 3-5 cm apart, about 2 mm in diameter. Keelia is an epiphytic succulent plant with large, white and fragrant flowers, which open in the evening from May to September.

There are sharp thorns on the succulent stems of the keel. Pay special attention to the sharp thorns on the succulent stems of the keel. In addition, the white milk in the stems is poisonous, especially cannot enter the eyes. Therefore, in home cultivation, the juice is poisonous, especially cannot enter the eyes. Note that the place should be appropriate to avoid poisoning by children and the elderly. For the house between the newly renovated family and the office building, the keel is still a good air purifier for the house between the newly renovated family and the office building. Keel is an excellent air purifying plant. It has good adsorption effect on formaldehyde, benzene, radon, ammonia and TVOC.

Dragon bone flower can treat dry heat cough, hemoptysis, and cervical lymph node stenosis. Stem treats mumps, hernia, pain and swelling, and has obvious curative effects on cerebral arteriosclerosis and cardiovascular disease. It has the functions of clearing heat and moistening the lungs, removing phlegm and relieving cough, nourishing and nourishing the face, and it is an excellent clearing and nourishing soup.