• Korean Journal of Plant Taxonomy
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• v.41 no.2
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• pp.164-170
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• 2011

Two naturalized plants (Euphorbiaceae) were recorded from Busan Metropolitan City and from the Jeju Special Self-Governing Province. Euphorbia heterophylla L. (A-me-ri-ka-dae-geuk) was found in a park near Suyeong-gang, Allak-dong, Dongnae-gu, in Busan Metropolitan City. This species is distinguished from E. dentata by its alternating leaves of main stem and glands of involucres with a circular opening. Euphorbia hirta L. (Teol-ttang-bin-dae) was found in Yerae village, Yerae-dong, Seogwipo-si, in Jeju Special Self-Governing Province. It is distinguished from E. hypericifolia as it has capsules with hairs.

• Korean Journal of Plant Taxonomy
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• v.38 no.3
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• pp.333-343
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• 2008

Two newly naturalized species were recorded from Gangwon-do and Jeju-do. Among them, numerous populations of Hieracium caespitosum (Asteraceae) were found in 2006 along the road near the military area at, Mt. Dosolsan, Yanggu-gun, Gangwon-do. The other species, Trifolium incarnatum (Fabaceae) was widespread and found at various locations including Jeongsil and Woo-do in Jeju-si, Jeju-do and Gasioreum, Daejeong-eup, Seoguipo-si, Jeju-do and Daehandawon Plantation in Hoecheon-myon, Boseong-gun, Jeonranam-do in 2008. Hieracium caespitosum was found to be distinguished from the allied species, H. umbellatum in the same genus, by a lot of capitula and a well developed cluster of basal leaves during the flowering time. Trifolium incarnatum can be distinguished from other species in the same genus by an erect form, long inflorescence and deep-red flowers.

• Korean Journal of Plant Taxonomy
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• v.35 no.2
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• pp.153-159
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• 2005

We reported that an alien species of Plantaginaceae, Plantago aristata Michx. from North America, grows at the Han-River estuary in Go-Yang City, Kyunggi Province. This species is easily distinguished from others in Korea by its linear leaves, cylindrical spikes with long linear bracts at base, and relatively large flowers of ca. 4-6 mm in diameter. We called the species as gin-po-ggot-jil-kyung-i as a local name. Plantago aristata is known to be very invasive and has been already introduced to Japan and China.

• Korean Journal of Plant Taxonomy
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• v.40 no.4
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• pp.240-246
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• 2010

Two newly naturalized species were recorded from Incheon (Youngjong-do) and Ulsan. Among them, Bidens polylepis S.F. Blake (Asteraceae) was widespread and was found in the following locations: Unbuk bridge, Unbuk-dong, Jung-gu in Incheon, and Chuiseosan, Banggi-ri, Samnam-myeon as well as a Saemmul mountain cabin on Jaeaksan, Sangbuk-myeon in Ulju-gun, Ulsan. Bidens polylepis can be distinguished from congeneric species by its larger ray-flowers. The Korean name of Bidens polylepis was newly formulated based on the characteristic of its yellow ray-flowers and on the Korean name of the genus Bidens (Asteraceae). The other species, numerous populations of Saponaria officinalis L. (Caryophyllaceae) were found in two areas in Jeotgae village, Unseo-dong, Jung-gu, Incheon. Saponaria officinalis can be distinguished from congeneric species in the family by two features, shallow calyx teeth and a petal with appendages at the base of the blade.

• Korean Journal of Plant Taxonomy
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• v.41 no.2
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• pp.171-174
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• 2011

A naturalized species, Silene antirrhina L is newly reported in Korea. S. antirrhina L. was found along the Geumho riverside in Daegu. S. antirrhina L. is similar to S. koreana Kom. and S. armeria L. in that it has dark glutinous areas. S. antirrhina L. can be distinguished from congeneric species by the stamens and styles of its sepal and seed surface which are finely papillate. The Korean name of S. antirrhina L. "Ganeun-Kkunkkunijangguchea" was newly formulated based on the overall characteristics of this thin and small plant and on the Korean name of S. koreana Kom. photos of the habitat and a description and key of characteristics are provided.

• Korean Journal of Plant Taxonomy
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• v.44 no.2
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• pp.132-135
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• 2014

A newly naturalized plant, Amaranthus powellii S. Watson was found Jail-dong, Uijeongbu-si, Gyeonggi-do, Korea. This species is native to Southwestern USA and Northern Mexico, and it is also naturalized in worldwide of temperate regions. This species was distinguished from the related species, A. patulus Bertol. and A. hybridus L., by leave blades broadly elliptic, rhombic or lanceolate, petals unequal, without conspicuous green mid-veins, and utricle gradually narrowed toward the stigma. Korean name was given as 'Min-teol-bi-reum' to A. powellii S. Watson, based on the character, it was hairy less than the three related species, A. patulus Bertol., A. hybridus L. and A. retroflexus L., conspicuously. Descriptions for mophological characters, photographs, illustrations and keys to allied taxa were provided.

• Korean Journal of Plant Taxonomy
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• v.35 no.3
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• pp.201-209
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• 2005

Two new naturalized species, Amaranthus hybridus and Crepis tectorum, are reported here. Descriptions and illustrations of the species and comparison of morphology with related species are provided. Amaranthus hybridus was first found at Nanjido, Seoul and is widely distributed in the central and southern part of Korean peninsula. New Korean name is given as "Ginteolbireum". It is well distinguished from the related species, A. retroflexus and A. patulus, by its late flowering time (September to October), sparse hair on the leaves, similar length between tepal and fruit, and long inflorescence without division. Crepis tectorum was first found at the entrance of Weoljeongsa Temple in Pyongchang-gun, Gangwon-do and spreads rapidly to other areas. New Korean name is given as "Nadomindulle".

• Korean Journal of Plant Taxonomy
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• v.39 no.4
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• pp.309-314
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• 2009

Two naturalized species, Glyceria declinata $Br{\acute{e}}b$. and Puccinellia distans (Jacq.) Parl. are herein newly reported from Korea. Glyceria declinata, 'Yu-Reop-Yuk-Jeol-Bo-Ri-Pul', was found along the Seomjin River, Gurye-eup, Gurye-gun, Jeollanam-do, as well as along the Gwangjucheon River, Sa-dong, Dong-gu, Gwangju. It is distinguished from G. acutiflora by spikelets 15-20mm long and obtuse lemma. Puccinellia distans, "Cheo-Jin-Mi-Kku-Ri-Gwang-I", was found in Yeongjong Island, Incheon, Yongyu Island, Incheon and Chojijin, Ganghwa-gun. It is distinguished from P. nipponica by lemmas 1.8-2.5mm long, ligule 1-2mm long and the lower branches of panicle usually reflexed after anthesis.

• Korean Journal of Plant Taxonomy
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• v.46 no.3
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• pp.326-330
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• 2016

Two naturalized species, Polygonum ramosissimum Michx. (Polygonaceae) and Spergularia bocconi (Scheele) Graebn. (Caryophyllaceae) were found along the southwest seashore of the Korean Peninsula. Polygonum ramosissimum is distinguished from other species in the same genus taxa as follows: not granular achens, lanceolate or oblanceolate leaves. Spergularia bocconi is distinguished from other species in the same genus taxa by having glandular hairs on stems, leaves, peduncles, and outer surfaces of sepals. We provide here a description and photographs of two species and a key to related taxa in Korea.

• Korean Journal of Plant Taxonomy
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• v.36 no.2
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• pp.145-151
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• 2006

Two naturalized allien species are reported from Jeju Island: Papaver setigerium collected from the ground along the road in lowland Veronica serpyllifolia collected from the roadside and ranches on alt. 400-800 m. P. setigerium is similar to P. somniferum, but different from the latter by plant height of 30-70 cm, shorter discoid stigma than fruit in diameter, somewhat sparsely bristly on stems, leaves and calyxes. V. serpyllifolia is similar to V. tenella in morphology, but different from the latter by short plant height, petiolated leaves on lower stem and serrated leaf margins.