rice is an annual aquatic herb of Gramineae. The stalks are erect, .5-1.5 meters high, which varies with varieties.
The leaf sheath is hairless and slack; Ligule lanceolate; Leaf blade linear-lanceolate, about 1 cm wide, glabrous, rough. Panicle is large and sparse, with rough edges; Spikelets contain 1 mature flower; The glume is very small, leaving only a half-moon mark at the apex of the spikelet stalk, which is cone-shaped; The lemma of the pregnant flowers on both sides is thick, with 5 veins, the midvein is ridged, the surface has small milky protrusions with squares, thick paper, and dense hairs all over the fine hairs, with or without awns; Palea and lemma are homogeneous, with 3 veins, and the apex is pointed without beak; Stamens and anthers are 2-3 mm long. Caryophyll is about 5 mm long and 2 mm wide; Embryo ratio is about 1/4 of caryopsis length.
Rice is an important grain widely planted in tropical Asia. Southern China is the main rice-producing area, and it is planted in northern provinces. The seeds are mainly divided into two subspecies, indica rice and japonica rice. Subspecies include many cultivated varieties. Use mature caryopsis as medicine. Sweet and warm. And digestion, spleen and appetite.