• Korean Journal of Plant Taxonomy
• /
• v.50 no.3
• /
• pp.361-367
• /
• 2020

We report meiotic chromosome numbers of three taxa in Carex sect. Mitratae in Korea: Carex breviculmis R. Br. (n = 32_II, 33_II, 34_II), C. polyschoena H. Lév. & Vaniot (n = 37_II, 38_II), and C. sabynensis Less. ex Kunth (n = 27_II). Section Mitratae is one of the most species-rich Asian groups in Carex, comprising approximately 45-80 taxa. Twenty-seven of these occur in Korea, and they are some of the most challenging taxa to identify due to their obscure and inconspicuous diagnostic characters. Including the counts reported here, half of the native Korean sect. Mitratae chromosome numbers have been documented. Their haploid chromosome numbers range from n = 10 to n = 40, and many exhibit variations in the numbers counted within a taxon. These variations, along with the overall significant variation in sect. Mitratae, suggest that dynamic chromosome activity may be related to the high species diversity of Carex.

• Korean Journal of Plant Taxonomy
• /
• v.42 no.4
• /
• pp.275-277
• /
• 2012

Carex kamagariensis K. Okamoto was found in throughout the nation. This species is distinguished from other related taxa in Carex sect. Mitratae by pistillate scales with a long arista and achenes constricted above in the middle. A new Korean name, 'Jom-mok-po-sa-cho', is based on its small size and floral character similarity to C. genkaiensis. In this study, a description, illustrations and habitat photos of the species are provided. The key of its related species is also provided.

• Korean Journal of Plant Taxonomy
• /
• v.53 no.2
• /
• pp.166-169
• /
• 2023

Carex brevispicula (Cyperaceae) is endemic to Korea and is characterized by constricted achenes, short lateral spikes, and awned staminate and pistillate scales. The species classified in sect. Mitratae occurs throughout South Korea, perennating on mountains and/or rocky slopes under half shadow conditions. Meiotic chromosomes of the species were examined in this study, in which 33 meiotic cells from seven populations were found to be less than 2 ㎛ long with non-constricted chromosomes (n = 34_II). The stable chromosome number may be related to the narrow geographical distribution and/or distinct achene morphology. Further investigations of the distribution, morphological character variation, and chromosome characteristics should be conducted with closely related taxa to understand the derivation of the species and its endemism in Korea.

• Korean Journal of Plant Taxonomy
• /
• v.44 no.1
• /
• pp.33-38
• /
• 2014

Three unrecorded species, Carex chungii Z. P. Wang, C. tsushimensis (Ohwi) Ohwi, C. multifolia Ohwi were found in Korea. C. chungii Z. P. Wang was found in Is. Wan and Is. Geogeum, Jeollanam-do and Namhae, Gyeongsangnam-do. This species is distinguished from C. leuchoclora Bunge by achenes constricted above in the middle. C. tsushimensis (Ohwi) Ohwi was found in Is. Gageo, Sinan, Jeollanam-do. This species is distinguished from C. conica Boott by pistillate scales with a long arista. C. multifolia Ohwi was found in Haenam, Jeollanam-do. This species is distinguished from C. sachalinensis var. sikokiana (Franch. & Sav.) Ohwi by caespitose and leaf of light gray. We provide here their description, illustration, photographs and the key of related species.

• Korean Journal of Plant Taxonomy
• /
• v.44 no.2
• /
• pp.81-83
• /
• 2014

An unrecorded species, Carex rugata Ohwi, was found in Jeollabuk-do and Jeollanam-do. This species is distinguished from Carex breviculmis R. Br., C. mitrata Franch., C. polyschoena H. Lev. & Vaniot, C. genkaiensis Ohwi, C. formosensis H. Lev. & Vaniot and C. kamagariensis K. Okamoto by having achenes with excavated faces. Carex rugata Ohwi was named 'Ju-reum-cheong-sa-cho' in Korean based on its specific epithet. In this study, a description, illustrations and photographs of the species are provided.