大基荸荠

Heleocharis kamtschatica (C. A. Mey.) Kom. form. reducta Ohwi, Cyper. Jap. II in Mem. Coll. Sci. , Kyoto Imp. Univ. , ser. B, XVIII (1944) 45——Heleocharis mitrata (Franch. et Savat. ) Makino in Bot.Mag. Tokyo VIII (1894) 380; Kitagawa, Lineam. Fl. Manshur. (1939) 120——Scirpus mitratus Franch. et Savat. Enum. Pl. Jap. II (1879) 111 et 544, nonGriseb. ——Fleocharis savatieri C. B. Clarke ex Levl. in Bull. Acad. Int. Geogr. Bot. XIV (1904) 203, nom. sol. et in. Kew Bull. Add. Ser. VIII (1903) 21 et Ill. Cyper. (1909) t. 36, f. 15-18.

下位刚毛退化，只剩残余，甚至完全缺如。

产于东北各省、河北；生于潮湿处。分布于朝鲜和日本。