morphological character
Small deciduous trees, 3-5 meters high; The bark is thin, grayish white and much branched. Leaves are paper-thin, arranged in two rows, elliptic-lanceolate, or oblong, 6- 17.5 cm long and 2-7.5 cm wide, with sharp or blunt tip, wide wedge-shaped or round base, light green back, slightly hairy at first, and glabrous later; There are 8- 15 lateral veins on each side, which are flat on the top and convex on the bottom.
Flowers solitary or 2-4 flowers clustered on the top of branches or opposite leaves, about 2 cm long, blue-yellow, drooping; Buds lanceolate; Sepals triangular, puberulent; The petals of the outer wheel are narrow and thick, fleshy, rectangular, and sharp at the top, arranged like tweezers, while the petals of the inner wheel are extremely small, degenerating into scales and slightly hairy; Stamens oblong, connective wide, apex nearly truncated; Carpels are oblong, hairless, stigma ovate-lanceolate, and each carpel has 1 ovule.
The fruit is a spherical or heart-shaped conical aggregate fruit with a diameter of 5- 10 cm, hairless, yellow-green, and covered with white icing. The flowering period is May-June, and the fruiting period is June-165438+1October.
Extended data:
strange hobby
Annona is native to tropical America, so it likes warm and dry environment. Growth habits like light and warm climate, requiring annual average temperature above 22 degrees, not cold-resistant; Suitable for deep fertile sandy loam with good drainage.
plant
Annona is suitable for growing in sandy soil, loam or clay loam with good structure and drainage. Because its roots are shallower than ordinary fruit trees, the soil depth is about 1 m. The ideal pH value of annona squamosa is 6.0-6.5, in which the available nutrients in soil are most easily utilized by plants.
Because annona likes warm and dry environment, it is not suitable to cultivate annona in autumn and winter, which is not conducive to the adjustment of fruit production period. Moreover, the root system of annona squarrosa is shallow, and the branches and leaves are fragile, so it is easy for the plants to shake due to strong winds, causing root damage, so it is forbidden to plant in windward and windy places by the sea.
References:
Baidu encyclopedia-annona