Heleocharis kamtschatica (C. A. Mey.) Kom. f. reducta Ohwi (Cyperaceae)
无刚毛荸荠（变型）图版XXIII, 1-4
名称文献：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.
形态特征：下位刚毛退化，只剩残余，甚至完全缺如。
产地分布：产于东北各省、河北；生于潮湿处。分布于朝鲜和日本。