Carex olivacea subsp. confertiflora Carex olivacea subsp. confertiflora (Boott) Koyama in Bot. Mag. Tokyo 72: 307. 1959≡Carex confertiflora Boott in A. Gray, Bot. Jap.: 418. 1859≡Carex olivacea var. minor Kuk. in Pfl. R. Heft 38: 618. 1909
