The plant is about 3 to 15 meters long, with many branches, thick stems, dark green color, three edges, and the shape of the edges is winged.
Keel plant for 4 to 5 meters, with small thorns around the edge, very short
The flower is funnel-shaped, 25-30cm long and 15-25cm in diameter. It blooms at night. The part holding the flower is distributed with light green or yellow green scales. The flowering period is from July to December.
Keel flowers generally open in summer, the color of the flowers is white, generally 4 to 9 gathered in the above
The fruit of the ruler is red in color, with a long ball shape and a diameter of about 5 to 10 cm, which is our common pitaya.
The fruit color of keel is blue purple, which can also be eaten.