• Title/Summary/Keyword: Taxon

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Records of desmids (Chlorophyta) newly found in Korea

  • Kim, Han Soon
    • Journal of Ecology and Environment
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    • v.37 no.4
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    • pp.299-313
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    • 2014
  • The present study summarizes the taxonomic notes and korean distribution of 29 taxa of the desmids (Chlorophyta) collected from several swamps, reservoirs, rivers, and high land wetlands in South Korea from 2009 to 2013. All of these consisting of 9 genera (Tetmemorus 1 taxon, Pleurotaenium 5 taxa, Triploceras 1 taxon, Euastrum 7 taxa, Cosmarium 6 taxa, Staurastrum 5 taxa, Xanthidium 1 taxon, Hyalotheca 2 taxa, and Desmidium 1 taxon) are newly described in Korean freshwater algal flora. In this study, light microscopy of all of these are presented and briefly discussed with regard to their taxonomy, distribution and ecology within South Korea.

Improvement of A Concept-Based Text Categorization System(TAXON) Using Weight Determination Heuristic (가중치 부여 휴리스틱을 이용한 개념 기반 문서분류기 TAXON의 개선)

  • 강원석;강현규;김영섬
    • Proceedings of the Korean Information Science Society Conference
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    • 1998.10c
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    • pp.153-155
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    • 1998
  • 본 논문에서는 개념을 기반으로 문서의 분류를 하는 확률벡터 모델의 분류기TAXON(Concept-based Text Categorization System)의 개선을 도모한다. TAXON은 한국어 문장을 분석하여 명사를 추출하고 명사의 개념을 시소러스 도구를 통해 획득한 후 이를 벡터화하여 주제와 입력 문서와의 관계성을 검사하는 문서 분류기이다. 본 논문은 문서 분류기 TAXON의 성능을 향상시키기 위하여 확률벡터 계산에 가중치 부여 휴리스틱을 도입한다. 그리고 시소러스 도구를 확장하여 문서 분류의 질을 높인다.

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A Cytotaxonomic Study on Chrysanthemum zawadskii Complex in Korea (2) Polyploidy (한국산 구절초무리의 세포분류학적 연구;(2) 배수성)

  • 이영노
    • Journal of Plant Biology
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    • v.12 no.1
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    • pp.35-48
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    • 1969
  • This study was made on the taxa Chrysanthemum zawadskii complex that grow in South Korea on the basis of chromosomes, epidermis, pollens and gross morphology. I have found four types of chromosome numbers, 36, 45, 54, and 72 as a polyploidal series. Even though the gross morphology was quite similar almost the same gross morphology, chromosome number was different among the taxa. The taxa of 36 chromosomes present broad and fine lobed leaves which grow separately, broad leafed taxon in the mainland of Korea and the other's in Ullungdo Island which is isolated form the mainland in the East Sea. The taxa of 54 chromosomes are also present in the broad and in the fine lobed leaves. The fine lobed leave taxon grows in central to northern Korea and in the high altitude of mountains. Broad leafed taxon grows in central to southern Korea and comparatively lower altitude of the mountains. The taxon of 72 chromosomes is grown in the high altitude of Mt. Hallasan which is isolated from the mainland of Korea. According to this study of Chrysanthemum zawadskii complex, I have arranged the scientific names, as Chrysanthemum zawadskii subsp. latilobum, subsp. acutilobum, subsp. naktongenese, subsp. lucidum, subsp. coreanum and hybrid between subsp. acutilobum X subsp. latilobum.

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A taxonomic study of Hemerocallis (Liliaceae) in Korea (한국산 원추리속(Hemerocallis)의 분류학적 연구)

  • Hwang, Yong;Kim, Muyeol
    • Korean Journal of Plant Taxonomy
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    • v.42 no.4
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    • pp.294-306
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    • 2012
  • Taxonomic study of the genus Hemerocallis (Liliaceae) in Korea was conducted based on morphological data. H. middendorffii was distinguished from its related taxon H. dumortieri by the trait of coriaceous long bract with green color. H. taeanensis was distinguished from its related taxon H. minor by its odorless flowers, longer perianth tube and leaf length. H. thunbergii was distinguished from its related taxon H. lilioasphodelus by its long perianth tube. Lastly, H. hakuunensis was distinct from its related taxon H. hongdoensis as a result of its extreme branching of scape and short leaf width. From this study, it was revealed that H. minor, H. lilioasphodelus, and H. dumortieri were distributed only in the northern part of the Korean peninsular.

Diagnostic characters and new populations of Lycopus lucidus var. hirtus (Lamiaceae) (큰쉽싸리 진단형질 및 신자생지 보고)

  • Moon, Hye-Kyoung;Kim, Young-Chul;Hong, Suk-Pyo
    • Korean Journal of Plant Taxonomy
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    • v.43 no.2
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    • pp.99-102
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    • 2013
  • The natural populations of Lycopus lucidus Turcz. ex Benth. var. hirtus Regel (Lamiaceae) were found in Gangwon province, Korea. This taxon was mainly distinguished from L. lucidus Turcz. ex Benth. var. lucidus by having multicellular hairs on the stem and leaves. However, the delimitation of this taxon from the typical plants of this variety (var. lucidus) was never assessed and the existence of this taxon was obscure in Korea. So, we provide a detailed morphological description of this taxon, as well as its geographical distribution and habitat.

A New Taxon of Goodyera (Orchidaceae): G. × tamnaensis (신분류군 탐라사철란(난과))

  • Lee, Chang Shook;Yeau, Sung Hee;Lee, Kyung Seo;Lee, Nam Sook
    • Korean Journal of Plant Taxonomy
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    • v.40 no.4
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    • pp.251-254
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    • 2010
  • We describe a new taxon of Goodyera (Orchidaceae), G. ${\times}$ tamnaensis N.S. Lee, K.S. Lee, S.H. Yeau & C.S. Lee, sp. nov., from Jeju Island. This taxon is presumed to be a hybrid between G. schlechtendaliana and G. velutina based on several morphological characteristics, i.e., leaf venation, a patterned leaf surface and raised leaf epidermal cells, the color of the flower and the bract, the lateral sepal shape, and the hair length. The morphological characteristics and illustrations of the species based on the holotype are provided together with photographs of the habitat.

A new taxon of Hymenophyllum (Hymenophyllaceae): H. wrightii f. serratum (처녀이끼속의 신분류군: 구름처녀이끼(처녀이끼과))

  • Lee, Chang Shook;Lee, Kanghyup;Lee, Seong Gwon;Ebihara, Atsushi
    • Korean Journal of Plant Taxonomy
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    • v.44 no.4
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    • pp.233-237
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    • 2014
  • A new taxon, Hymenophyllum wrightii f. serratum C.S. Lee & K. Lee (Hymenophyllaceae), forma nov. was collected and described from forests in Mt. Halla, Jeju-do, Korea. This taxon, H. wrightii f. serratum C.S. Lee & K. Lee (vernacular name: 'Gu-reum-cheo-nyeo-i-kki') was distinguished from H. wrightii f. wrightii by having smaller leaves, broader basal part of leaf blade, broad-ovate laminae, larger sori and serrate margins of lips of involucres. The new taxon's name is based on serrate margin shape of the lips. A Korean name, 'Gu-reum-cheo-nyeo-i-kki', was newly given based on its habitat. Descriptions and its photograph in the habitat are provided along with a key to the species of Hymenophyllum from Korea.

First record of Hypodematium squamuloso-pilosum Ching (Hypodematiaceae) from Korea (한반도 미기록 식물: 흰금털고사리(금털고사리과))

  • Lee, Chang Shook;Lee, Kanghyup;Lee, Man Kyu
    • Korean Journal of Plant Taxonomy
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    • v.47 no.2
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    • pp.119-123
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    • 2017
  • A new unrecorded species, Hypodematium squamuloso-pilosum Ching (Hypodematiaceae), previously known only in China, was newly found on the rocks of a limestone mountain in Yeongwol-gun, Gangwondo, Korea. This taxon is distinguished from H. glanduloso-pilosum (Tagawa) Ohwi, reported as a species of Hypodematium in Korea based on linear lanceolate scales on the rhizome and a stipe base, white long hairs throughout the leaves, rarely reddish brown curly linear scales on the stipe, and oblong-lanceolate basal pinna. This taxon was most similar to H. hirsutum based on the plant height, rhizome, scale shape and size, sori position, and indusium shape. A new Korean name, 'Huin-geum-teol-go-sa-ri', was given based on the long white hair throughout. Descriptions and illustrations of this taxon and a photograph of its habitat are provided from Korea.

Mycena subpiligera sp. nov., a Symbiotic Species from China Associated with the Seed Germination of Gastrodia elata

  • Li-na Liu;Guo-ying Zhou;Ai-rong Shen;Bao-ming Shen;Yun Tan;Zhu-ming Tan
    • Mycobiology
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    • v.50 no.5
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    • pp.294-301
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    • 2022
  • Mycena subpiligera, a new taxon in sect. Fragilipedes that can strongly enhance the germination efficiency of Gastrodia elata seeds, was discovered in subtropical areas of China. As revealed by a morphological comparison with related Mycena species as well as maximum likelihood (ML) and Bayesian phylogenetic analyses based on sequences of the internal transcribed spacer (ITS) and the large subunit (LSU) regions of nuclear ribosomal RNA, the new taxon can be distinguished from phenotypically similar and phylogenetically related species. Optimal cultural conditions for M. subpiligera basidiomata are reported, and the germination rate of the new species is compared with that of M. citrinomarginata.

Some Free-Living Heterotrophic Flagellates from Marine Sediments of Tropical Australia

  • Lee, Won-Je
    • Ocean Science Journal
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    • v.41 no.2
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    • pp.75-95
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    • 2006
  • The diversity of heterotrophic flagellates was examined at marine sediments around Cape Tribulation, Australia. The species described belong to the Alveolates, Apusomonadiae, Cercomonadida, Choanoflagellida, Cryptomonadida, Diplomonadida, Euglenozoa incertae sedis, Kathablepharidae, Kinetoplastida, Pedinellids, Stephanopogonidae, Stramenopiles, Stramenopiles incertae sedis, Thaumatomonadidae and Protista incertae sedis. Among the 51 species from 38 genera encountered in this study is one new taxon: Glissandra similis n. sp., and two new names are introduced: Goniomonas abrupta (Skvortzov 1924) nomen nodum and Cercomonas skvortzovi (Skvortzov 1977) nomen nodum. There was little evidence for endemism because most flagellates including one new taxon described here have been reported.