Grapefruit (scientific name: citrus maxima? (Burm) Merr is a plant of Rutaceae and Citrus. Trees. The shoots, leaf backs, pedicels, calyx and ovary are all pilose, the leaves are usually dark purple, and the shoots are flat and angular.
The leaves are thick, dark green in color, oval or oval in width. The leaves in Hebei are 9- 16 cm long and 4-8 cm wide. Racemes, sometimes with axillary single flowers; Buds are purplish red and thin milky white; Calyx irregularly 5-3-lobed; Petal length 1.5-2 cm; Stamens 25-35, sometimes some stamens are sterile. The fruit is round, oblate, pear-shaped or wide cone-shaped, the peel is extremely thick or thin, spongy, the oil cells are large, the nucleus is convex, solid but soft, and the petals are 10- 15 or as many as 19.
There are more than 200 seeds, some of which are seedless, irregular in shape, usually nearly rectangular and single embryo. The flowering period is April-May and the fruiting period is September-65438+February.