Allium longistylum, also called riverside chive, is a species of wild onion native to Korea and northern China (Hebei, Inner Mongolia, Shanxi). It grows at elevations of 1500–3000 m.Flora of China v 24 p 192 长柱韭 chang zhu jiu Allium longistylumChoi, H.J. & Oh, B.U. (2011). A partial revision of Allium (Amaryllidaceae) in Korea and north-eastern China. Botanical Journal of the Linnean Society 167: 153-211.
Allium longistylum has bulbs rarely more than 8 mm across. Scape is up to 50 cm high. Leaves are about the same length as the scape but only 2–3 mm across. Umbels are spherical. Flowers are red or reddish-purple.Baker, John Gilbert. 1874. Journal of Botany, British and Foreign 12(142): 294.line drawing of Allium longistylum, Flora of China Illustrations vol. 24, fig. 210, 1-4 Nakai, Takenoshin. 1943. Journal of Japanese Botany 19:316.Franchet, Adrien René. 1884. Plantae Davidianae ex Sinarum Imperio 1: 305.
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