描述：7b. Hordeum distichon var. nudum Linnaeus, Sp. Pl. 1: 85. 1753.
裸麦 luo mai
Hordeum distichon convar. nudum (Linnaeus) Tzvelev; H. distichon subsp. nudum (Linnaeus) Rothmaler; H. nudum (Linnaeus) Arduino; H. sativum Jessen var. nudum (Linnaeus) Vilmorin; H. vulgare var. nudum (Linnaeus) J. D. Hooker.
Central spikelet: caryopsis free from lemma and palea. Fl. and fr. Jul–Aug. 2n = 14.Cultivated as a fodder plant, or a weed in fields of Hordeum vulgare. NW and SW China [widely cultivated in temperate regions].
From Flora of China: FOC Vol. 22 Page 399