Cactus (scientific name: cactus (hawthorn. ) haw. var。 dillenii (ker-gavl。 (Benson) is a variety of 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.
The seeds are mostly oblate, with slightly irregular edges, hairless and yellowish brown.
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. Cactus likes light and drought, and is suitable for growth in neutral and slightly alkaline soil. Usually planted as a fence, the stems are used as medicine, and the berries are sweet and sour.
Tufted succulent shrub, height (1-) 1.5-3m. The upper branches are broadly obovate, obovate elliptic or nearly round, with a length of 10-35(-40) cm, a width of 7.5-20(-25) cm and a thickness of 1.2-2 cm. The top is round, the edge is usually irregular and wavy, the base is wedge-shaped or tapered, green to blue-green, and hairless. The nests are sparse, with a diameter of 0.2-0.9 cm, which is obviously prominent. After growing, the spines often thicken and increase, and each nest has (1-)3- 10(-20) spines, which are densely covered with short hairs and barbed bristles. The thorn is yellow, with light brown horizontal stripes, roughly rhombic, slightly spreading and bending inward, and the base is flat and hard, with a length of 1.2-4(-6) cm and a width of 1- 1.5 mm; Barbary bristles are dark brown, 2-5 mm long, erect, more or less persistent; Short wool gray, shorter than barbed bristles, durable. Leaves subulate, 4-6 mm long, green, caducous.
Flowers radial, 5-6.5 cm in diameter; Receptacle is obovate, 3.3-3.5 cm long, with a diameter of 1.7-2.2 cm, with a concave top, a green tapering base, sparsely protruding nests, short hair, barbed bristles and subulate spines; Calyx-like tepals are obovate to narrowly obovate in width,10-25mm in length and 6-12mm in width, with sharp or round apex, small apex and yellowish green edges;
Petal tepals are obovate or spoon-obovate, 25-30mm long and12-23mm wide, with rounded, truncated or slightly concave tips and full or slightly rough edges; Filaments are light yellow, 9- 1 1 mm long; The anther is about 65438 0.5 mm long and yellow. Style length 1 1- 18mm, diameter 1.5-2mm, light yellow; Stigma 5, 4.5-5 mm long, yellowish white.