What are the morphological characteristics of millet (millet, millet, sorghum)?

Annual cultivated species, stout and erect, about 50 ~ 150 cm high. Leaf sheath glabrous, ligule ciliate, leaf blade linear-lanceolate, upper part rough, lower part smooth. Panicle is spike-shaped, usually drooping or erect, with a length of 10 ~ 40 cm and a diameter of 1 ~ 5 cm, and its main axis is densely pilose. Bristles are significantly longer or only slightly longer than spikelets. The spikelet is oval, 2 ~ 3 mm long, the first glume has 3 veins, the second glume is slightly shorter, with 5 ~ 9 veins, the first lemma is as long as the spikelet, with 5 ~ 7 veins, and the palea is short. The texture is as long as the first lemma, oval or spherical, with tiny punctate wrinkles (Figure 7- 12). Cultivated in the temperate zone of Eurasia, it is more common in northeast, north and northwest China. The most common millet is diploid (2n= 18) and occasionally tetraploid (2n=36).