Knowledge about cactus

Cactus is a variety of prickly cactus. Tufted succulent shrubs, 1.5-3 m high. The upper branches are broadly obovate, obovate-elliptic or suborbicular, green to blue-green, glabrous; Thorn yellow, with light brown stripes, hard; The barb stands upright.

Leaves subulate, green, caducous. Flowers radiate; Receptacle obovate, base tapering, green; Calyx-like perianth yellow with green edges; Filaments are light yellow; Anthers yellow; Style light yellow; Stigma yellow and white.

Berries are obovoid, concave at the top, smooth and hairless, purple-red, with barbed and subulate bristles. Seeds numerous, oblate, slightly irregular, glabrous, yellow-brown. Flowering: June -65438+ 10.

Native to Mexico, the United States, the West Indies, Bermuda and northern South America; China was introduced in the late Ming Dynasty and widely cultivated in the southern coastal areas.

Extended data:

Cactus likes sunshine, warmth, drought tolerance, cold tolerance, waterlogging tolerance and acid soil, and is suitable for growing in neutral and slightly alkaline soil, with a pH value of 7.0-7.5. Therefore, cactus should be planted on the sunny windowsill in the family, and it is appropriate to choose oil bawo sandy soil with slight alkalinity and good ice transfer.

Cactus can promote the growth of plants in the sun, so it is necessary to see more sunshine, but it should be shaded in midsummer to prevent sunburn caused by direct glare. Cactus stored in unventilated places for a long time are vulnerable to the harm of red spiders in dry and hot seasons, showing aging yellowish brown.