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[Photo]: With picture
Higher Taxa Scientific Name
[Common name]
Legal control Distribution in Japan
Azollaceae, Hydropteridales, Filicopsida, Pteridophyta Azolla cristata   [Photo]
  [Water fern]
Yes Miyagi, Ibaraki, Gumma, Saitama, Tokyo, Aichi, Gifu, Ahiga, Kyoto, Osaka, Wakayama, H ...
Salviniaceae, Hydropteridales, Filicopsida, Pteridophyta Salvinia molesta   [Photo]
  [Giant salvinia]
This species infested in Hyogo and Okinawa Prefs. in past.
Iridaceae, Asparagales, Liliopsida, Magnoliophyta Iris pseudacorus   [Photo]
  [Water flag]
Almost entire Japan
Poaceae, Poales, Liliopsida, Magnoliophyta Andropogon virginicus
  [Broomsadge bluestem]
Kanto District and western Japan.
Poaceae, Poales, Liliopsida, Magnoliophyta Anthoxanthum odoratum   [Photo]
  [Sweet vernalgrass]
Almost entire Japan
Poaceae, Poales, Liliopsida, Magnoliophyta Avena fatua   [Photo]
  [Wild oats]
Almost entire Japan
Poaceae, Poales, Liliopsida, Magnoliophyta Briza maxima   [Photo]
  [Big quaking grass]
Kanto District to western Japan. There are records on occurrence in Akita Pref.
Poaceae, Poales, Liliopsida, Magnoliophyta Bromus catharticus   [Photo]
  [Rescuegrass]
Almost entire Japan
Poaceae, Poales, Liliopsida, Magnoliophyta Dactylis glomerata   [Photo]
  [Orchardgrass]
Hokkaido, Honshu, Shikoku, and Kyushu.
Poaceae, Poales, Liliopsida, Magnoliophyta Elytrigia repens   [Photo]
  [Quackgrass]
Yes Almost entire Japan
Poaceae, Poales, Liliopsida, Magnoliophyta Eragrostis curvula   [Photo]
  [Weeping Lovegrass]
Almost entire Japan
Poaceae, Poales, Liliopsida, Magnoliophyta Festuca arundinacea   [Photo]
  [Tall fescue]
Hookaido, Honshu, Shikoku, Kyushu
Poaceae, Poales, Liliopsida, Magnoliophyta Holcus lanatus
  [Common velvetgrass]
Almost entire Japan. In western Japan, relatively abundant in upland.
Poaceae, Poales, Liliopsida, Magnoliophyta Hordeum murinum   [Photo]
  [Wall barley grass]
Yes Almost entire Japan
Poaceae, Poales, Liliopsida, Magnoliophyta Lolium multiflorum   [Photo]
  [Italian Ryegrass]
Poaceae, Poales, Liliopsida, Magnoliophyta Paspalum distichum   [Photo]
  [Knotgrass]
Yes Kanto and Hokuriku District to western Japan
Poaceae, Poales, Liliopsida, Magnoliophyta Phleum pratense   [Photo]
  [Timothy]
Almost entire Japan. Relatively abundant in northern and upland area.
Poaceae, Poales, Liliopsida, Magnoliophyta Phyllostachys edulis   [Photo] Almost entire Japan. Northern most distribution is Hakodate, southern Hokkaido.
Poaceae, Poales, Liliopsida, Magnoliophyta Poa pratensis   [Photo]
  [Kentucky bluegrass]
Lowland in almost entire Japan
Poaceae, Poales, Liliopsida, Magnoliophyta Sorghum halepense   [Photo]
  [Johnsongrass]
Honshu, Shikoku, and Kyushu Islands.
Poaceae, Poales, Liliopsida, Magnoliophyta Spartina alterniflora
  [Saltmarsh cordgrass]
Aichi (Toyohashi and Handa Cities) and Kumamoto (Kumaoto and Uki Cities) Prefs.
Araceae, Alismatales, Liliopsida, Magnoliophyta Wolffia globosa
  [Rootless duckweed]
Kanto and Hokuriku District to western Japan
Cyperaceae, Poales, Liliopsida, Magnoliophyta Cyperus congestus   [Photo]
  [Dense flat sedge]
Tokyo, Chiba, and Saitama Prefs.
Cyperaceae, Poales, Liliopsida, Magnoliophyta Cyperus eragrostis
  [Tall flatsedge]
Kanto District and western region in main land of Japan, Okinawa, and Ogasawara (Boni ...
Cyperaceae, Poales, Liliopsida, Magnoliophyta Cyperus esculentus   [Photo]
  [Yellow nutsedge]
Honshu (except northern part), Shikoku, and Kyushu Islands.
Araceae, Alismatales, Liliopsida, Magnoliophyta Pistia stratiotes   [Photo]
  [Water lettuce]
Yes Kanto and Hokuriku District to western Japan. Ogasawara (Bonin) Islands.
Commelinaceae, Commelinales, Liliopsida, Magnoliophyta Tradescantia flumiensis   [Photo] 2012-09-18 updated
  [Wandering jew]
Tokyo, Saitama, Kanagawa, Shizuoka, Aichi, Mie, Toyama, kyoto, Osaka, Wakayama, Hyogo ...
Hydrocharitaceae, Alismatales, Liliopsida, Magnoliophyta Egeria densa   [Photo]
  [Brazilian elodea]
Honshu, Shikoku, and Kyushu of the Japanese main islands. Hachijojima Island (Izu Isl ...
Hydrocharitaceae, Alismatales, Liliopsida, Magnoliophyta Elodea nuttallii   [Photo]
  [Florida elodea]
Kanto District to western Japan.
Pontederiaceae, Commelinales, Liliopsida, Magnoliophyta Eichhornia crassipes   [Photo]
  [Water hyacinth]
Central to Southern Japan. Hachijojima Is. (Izu Islands). Especially abundant in Kyus ...
Arecaceae, Arecales, Liliopsida, Magnoliophyta Trachycarpus fortunei   [Photo] Kanto District to western Japan. Native to southern Kyushu.
Liliaceae, Liliales, Liliopsida, Magnoliophyta Lilium formosanum   [Photo]
  [Formosa lily]
Miyagi, Fukushima, Kanto District to western Japan, Ryukyus.
Alliaceae, Asparagales, Liliopsida, Magnoliophyta Nothoscordum gracile   [Photo]
  [Wild onion]
Ibaraki, Tokyo, Kanagawa, Shizuoka, Mie, Wakayama, Kyoto, Osaka, Hyogo, Kagawa, and T ...
Verbenaceae, Lamiales, Magnoliopsida, Magnoliophyta Verbena brasiliensis   [Photo]
  [Brazil vervain]
Southern Tohoku and Kanto District to western Japan
Rubiaceae, Rubiales, Magnoliopsida, Magnoliophyta Diodia teres   [Photo]
  [Poorjoe]
Central Honshu to western Japan
Plantaginaceae, Plantaginales, Magnoliopsida, Magnoliophyta Plantago lanceolata   [Photo]
  [Buckhorn plantain]
Almost entire Japan
Valerianaceae, Dipsacales, Magnoliopsida, Magnoliophyta Valerianella locusta   [Photo]
  [Lewiston cornsalad]
Entire Japanese main islands
Campanulaceae, Campanulales, Magnoliopsida, Magnoliophyta Triodanis perfoliata   [Photo]
  [Common nenus’ Looking-glass]
Middle to western Japan (Fukushima Pref. and southern part)
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Ageratina altissima
  [White Snakeroot]
The first record of establishment (1916) was in Hakone, Kanagawa Pref. Current distri ...
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Ambrosia artemisiifolia   [Photo]
  [Bitterweed]
Yes Almost entire Japan including Okinawa.
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Ambrosia trifida   [Photo]
  [Giant Ragweed]
Yes Almost entire Japan including Okinawa.
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Anthemis cotula
  [Mayweed]
Almost Entire Japan
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Artemisia sieversiana
  [Sievers wormwood]
Saitama, Kanagawa, Nagano, and Osaka, Kyoto Prefs.
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Aster subulatus   [Photo]
  [Annual salt-marshaster]
Almost entire Japan
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Bidens frondosa   [Photo]
  [Beggar’s Tick]
Almost entire Japan including Amami and Okinawa Islands.
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Bidens pilosa var. minor   [Photo] Central to western Japan
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Bidens pilosa var. pilosa   [Photo]
  [Hairy beggar-ticks]
Middle Honshu and western regions.
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Bidens pilosa var. radiata
  [Romerillo]
Southern Kyushu Is., Okinawa, Sakishima, and Ogasawara (Bonin) Islands.
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Chrysanthemum seticuspe   [Photo] Introduced to Honshu, Shikoku, and Tsushima Is. from China and South Korea.
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Cirsium arvense
  [Cananda thirstle]
Hokkaido, Tohoku, Kanto, Koshinetsu, Tokai, and Hokuriu Districts.
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Cirsium vulgare   [Photo]
  [Bull thisytle]
Yes Hokkaido, Honshu, and Shikoku Is. Especially spread in Hokkaido, including several sm ...
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Conyza canadensis   [Photo]
  [Canadian fleabane]
Almost entire Japan
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Conyza sumatrensis   [Photo]
  [Sumatran Fleabane]
Honshu, Shikoku, and Kyushu Is.
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Coreopsis lanceolata   [Photo]
  [Lance-leaved tickseed]
Yes Almost entire Japan including Okinawa.
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Cosmos bipinnatus   [Photo]
  [Common cosmos]
Almost entire Japan
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Crassocephalum crepidioides   [Photo]
  [redflower ragleaf]
Wide area of Honshu, Shikoku, and Kyushu, and Okinawajima and Ogasawara (Bonin) Islan ...
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Erigeron annuus   [Photo]
  [Annual fleabane]
Almost entire Japan
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Erigeron karvinskianus   [Photo]
  [Mexican fleabane]
Kanto District to western Japan
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Erigeron philadelphicus   [Photo]
  [Philadelphia fleabane]
Almost entire Japan
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Gaillardia pulchella
  [Rose-ring gaillardia]
Unknown Hokkaido, Tokyo, and Kinki District to southwestern Japan.
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Galinsoga quadriradiata   [Photo]
  [Hairy galinsoga,Shaggy soldier]
Almost entire Japan
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Gamochaeta coarctata   [Photo]
  [Spiked cudweed]
Kanto District to wester Japan.
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Gamochaeta pensylvanica   [Photo]
  [Wandering cudweed]
Almost entire Japan
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Gymnocoronis spilanthoides   [Photo]
  [Senegal tea plant]
Yes Tohigi, Gumma, Chiba, Saitama, Tokyo, Aichi, Shiga, Wakayama, Osaka, Hyogo, Kochi, Fu ...
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Helianthus tuberosus   [Photo]
  [Jerusalem artichoke]
Almost entire Japan
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Hypochaeris radicata   [Photo]
  [Catsear]
Almost entire Japan
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Rudbeckia laciniata   [Photo]
  [Golde Glow]
Yes Almost entire Japan. All the Prefectures of Honshu Island except Nara and Osaka; Hokk ...
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Senecio madagascariensis   [Photo]
  [Fireweed]
Yes Fukushima, Chiba, Shizuoka, Shiga, Mie, Nara, Osaka, Wakayama, Hyogo, Okayama, Kagawa ...
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Senecio vulgaris   [Photo]
  [Common groundsel]
Almost entire Japan
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Solidago altissima   [Photo]
  [Tall Golden rod]
Almost entire Japan
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Solidago gigantea subsp. serotina   [Photo]
  [Late goldenrod]
Almost entire Japan. More dominant than S. altissima in Hokkaido.
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Sonchus asper   [Photo]
  [Spiny sowthistle]
Almost entire Japan
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Sphagneticola trilobata   [Photo]
  [Creeping daisy]
Okinawa Islands
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Taraxacum officinale   [Photo]
  [Common dandelion,Lion's tooth]
Almost entire Japan
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Tripleurospermum maritimum subsp. inodorum   [Photo]
  [Scentless chamomile]
Hokkaido, Aomori, Akita, Kanagawa, Shizuoka, Mie, Hyogo, Okayama, Tokushima, Saga, an ...
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Verbesina alternifolia   [Photo]
  [Wingstem]
Hokkaido, Nagano Pref., etc.
Asteraceae, Asterales, Magnoliopsida, Magnoliophyta Xanthium occidentale   [Photo]
  [Oriental cocklebur]
Almost entire Japan
Verbenaceae, Lamiales, Magnoliopsida, Magnoliophyta Lantana camara   [Photo]
  [Common lantana]
Ogasawara (Bonin) Islands (Chichijima, Hahajima, Anijima, and Ototojima Is.), Okinawa
Verbenaceae, Lamiales, Magnoliopsida, Magnoliophyta Verbena bonariensis   [Photo]
  [Tall vervain]
Almost entire Japan
Scrophulariaceae, Scrophulariales, Magnoliopsida, Magnoliophyta Cymbalaria muralis   [Photo]
  [Ivy-leaved toadflax]
Hokkaido and Honshu Is.
Scrophulariaceae, Scrophulariales, Magnoliopsida, Magnoliophyta Lindernia dubia   [Photo]
  [Falsepinpernel]
Almost entire Japan
Scrophulariaceae, Scrophulariales, Magnoliopsida, Magnoliophyta Nuttallanthus canadensis   [Photo]
  [Oldfield toadflax]
Kanto, Hokuriku, to central and western Japan.
Scrophulariaceae, Scrophulariales, Magnoliopsida, Magnoliophyta Verbascum blattaria   [Photo]
  [moth mullein]
Yes Hokkaido to Tohoku District, Shizuoka, Mie, and Hyogo Prefs.
Scrophulariaceae, Scrophulariales, Magnoliopsida, Magnoliophyta Verbascum thapsus   [Photo]
  [Common mullein]
Yes Almost entire Japan. Especially abundant in Tohoku and Hokkaido District.
Scrophulariaceae, Scrophulariales, Magnoliopsida, Magnoliophyta Veronica anagallis-aquatica   [Photo]
  [Water speedwell]
Yes Almost entire Japan. All the Prefectures of Honshu Is. except Akita, Yamagata, Yamana ...
Scrophulariaceae, Scrophulariales, Magnoliopsida, Magnoliophyta Veronica arvensis   [Photo]
  [Corn speedwell]
Almost entire Japan
Scrophulariaceae, Scrophulariales, Magnoliopsida, Magnoliophyta Veronica persica   [Photo]
  [Commonfield speedwell]
Almost entire Japan
Lamiaceae, Lamiales, Magnoliopsida, Magnoliophyta Lamium purpureum   [Photo]
  [Red deadnettle]
Almost entire Japan
Lentibulariaceae, Scrophulariales, Magnoliopsida, Magnoliophyta Utricularia inflata   [Photo]
  [Swollen bladderwort]
Shizuoka, Aichi, Hyogo, and Osaka Prefs.
Solanaceae, Solanales, Magnoliopsida, Magnoliophyta Datura stramonium   [Photo]
  [Jimsonweed]
Almost entire Japan
Solanaceae, Solanales, Magnoliopsida, Magnoliophyta Physalis angulata   [Photo]
  [Wild capegooseberry]
Yes Almost entire Japan.
Solanaceae, Solanales, Magnoliopsida, Magnoliophyta Salpichroa origanifolia   [Photo] Yes Central to Western Honshu Island. The photo was taken in Ise, Mie Pref.
Solanaceae, Solanales, Magnoliopsida, Magnoliophyta Solanum carolinense   [Photo]
  [Carolina horse nettle]
Yes Almost entire Japan including Okinawa
Orobanchaceae, Scrophulariales, Magnoliopsida, Magnoliophyta Orobanche minor   [Photo]
  [Common broomrape ; Clover broomrape]
Honshu and Shikoku Is.
Convolvulaceae, Solanales, Magnoliopsida, Magnoliophyta Convolvulus arvensis   [Photo]
  [Field bindweed,Small bindweed]
Almost entire Japan
Cuscutaceae, Solanales, Magnoliopsida, Magnoliophyta Cuscuta campestris   [Photo]
  [Field dodder]
Almost entire Japan
Convolvulaceae, Solanales, Magnoliopsida, Magnoliophyta Ipomoea coccinea   [Photo]
  [Red morningglory]
Yes Middle to southern Japan
Convolvulaceae, Solanales, Magnoliopsida, Magnoliophyta Ipomoea hederacea   [Photo]
  [Ivyleaf morning glory]
Yes Hokkaido, many parts of Honshu, Shikoku, Kyushu, and Okinawa.
Boraginaceae, Lamiales, Magnoliopsida, Magnoliophyta Myosotis scorpioides   [Photo]
  [True forget-me-not]
Hokkaido, Tohoku, Kanto, Koshinetsu, Hokuriku, and Shikoku Districts, Shizuoka, and G ...
Oleaceae, Scrophulariales, Magnoliopsida, Magnoliophyta Ligustrum lucidum   [Photo]
  [Glossy Privet]
Yes Miyagi, Fukushima Prefs., and Kanto District to western Japan.
Malvaceae, Malvales, Magnoliopsida, Magnoliophyta Abutilon theophrasti   [Photo]
  [Chinese jute]
Almost entire Japan.
Malvaceae, Malvales, Magnoliopsida, Magnoliophyta Hibiscus cannabinus   [Photo]
  [Kenaf]
Not established in Japan. However, widely cultivated.
Chenopodiaceae, Caryophyllales, Magnoliopsida, Magnoliophyta Chenopodium pumilio   [Photo]
  [Tasmanian goosefoot]
Yes Almost entire Japan
Onagraceae, Myrtales, Magnoliopsida, Magnoliophyta Oenothera biennis   [Photo]
  [Common eveningprimrose]
Almost entire Japan
Onagraceae, Myrtales, Magnoliopsida, Magnoliophyta Oenothera laciniata   [Photo]
  [Cutleaf eveveningprimerose]
Honshu, Shikoku, and Kyushu
Onagraceae, Myrtales, Magnoliopsida, Magnoliophyta Oenothera rosea   [Photo]
  [Pink eveningprimerose]
Central to western Japan
Brassicaceae, Capparales, Magnoliopsida, Magnoliophyta Barbarea vulgaris   [Photo]
  [Common yellow rocket]
Most of entire Japan
Brassicaceae, Capparales, Magnoliopsida, Magnoliophyta Coronopus didymus   [Photo]
  [Swinecress]
Wide area with warm climate.
Brassicaceae, Capparales, Magnoliopsida, Magnoliophyta Nasturtium officinale   [Photo]
  [Watercress]
Most of entire Japan
Brassicaceae, Capparales, Magnoliopsida, Magnoliophyta Orychophragmus violaceus   [Photo]
  [Violet orychophragmus]
Almost entire Japan
Haloragaceae, Haloragales, Magnoliopsida, Magnoliophyta Myriophyllum aquaticum   [Photo]
  [Parrot’s Feather]
Yes Almost entire Japan (no record in Aomori, Iwate, Akita, Fukushima, Niigata, and Ishik ...
Cucurbitaceae, Violales, Magnoliopsida, Magnoliophyta Sicyos angulatus   [Photo]
  [Burcucumber]
Yes Almost entire Japan
Nyctaginaceae, Caryophyllales, Magnoliopsida, Magnoliophyta Mirabilis jalapa   [Photo]
  [Common four-o'clock]
Most of entire Japan
Oxalidaceae, Geraniales, Magnoliopsida, Magnoliophyta Oxalis corymbosa   [Photo]
  [Violet woodsorrel]
Kanto District and western part of Japan
Oxalidaceae, Geraniales, Magnoliopsida, Magnoliophyta Oxalis pes-caprae   [Photo]
  [Buttercup oxalis]
Central to southern Honshu, Kyushu, and Shikoku Is.
Moraceae, Urticales, Magnoliopsida, Magnoliophyta Morus australis   [Photo]
  [Aino mulberry]
Yes Ogasawara (Bonin) Islands. (Chichijima and Hahajima Is.)
Papaveraceae, Papaverales, Magnoliopsida, Magnoliophyta Papaver dubium   [Photo]
  [Field poppy]
Most of entire Japan
Tiliaceae, Malvales, Magnoliopsida, Magnoliophyta Corchorus olitorius
  [Nalta jute]
Almost entire Japan
Cabombaceae, Nymphaeales, Magnoliopsida, Magnoliophyta Cabomba caroliniana   [Photo]
  [Fanwort]
Honshu, Shikoku, Kyushu Islands.
Apiaceae, Apiales, Magnoliopsida, Magnoliophyta Conium maculatum   [Photo]
  [Poison hemlock]
Hokkaido and some parts of Honshu.
Apiaceae, Apiales, Magnoliopsida, Magnoliophyta Hydrocotyle ranunculoides   [Photo]
  [Floating marshpennywort]
Yes Okayama, Oita, Fukuoka, and Kumamoto Prefs.
Polygonaceae, Polygonales, Magnoliopsida, Magnoliophyta Rumex obtusifolius   [Photo]
  [Broadleaf dock]
Most of entire Japan
Phyllanthaceae, Malpighiales, Magnoliopsida, Magnoliophyta Bischofia javanica   [Photo]
  [Java Ceder]
Yes Ogasawara (Bonin) Islands.
Euphorbiaceae, Malpighiales, Magnoliopsida, Magnoliophyta Chamaesyce maculata   [Photo]
  [Milk purslane]
Almost entire Japan
Caryophyllaceae, Caryophyllales, Magnoliopsida, Magnoliophyta Cerastium glomeratum   [Photo]
  [Sticky chickweed,Mouse-ear chickweed]
Hokkaido, Honshu, and Shikoku Islands.
Caryophyllaceae, Caryophyllales, Magnoliopsida, Magnoliophyta Petrorhagia nanteulii   [Photo]
  [Childing pink]
Akita, Miyagi, Yamagata, Chiba, Kanagawa, Shizuoka, Aichi, Mie, Shiga, Osaka, Hyogo, ...
Simaroubaceae, Sapindales, Magnoliopsida, Magnoliophyta Ailanthus altissima   [Photo]
  [Tree of heaven]
Hokkaido, Gumma, Siatama, Kanagawa, Shizuoka, Aichi, Okayama, and Hiroshima Prefs.
Amaranthaceae, Caryophyllales, Magnoliopsida, Magnoliophyta Alternanthera denticulata   [Photo]
  [Joyweed]
Pacific coastal side of central to southern Japan.
Amaranthaceae, Caryophyllales, Magnoliopsida, Magnoliophyta Alternanthera philoxeroides   [Photo]
  [Alligatorweed]
Yes Chiba, Shizuoka, Shiga, Kyoto, Osaka, Hyogo, Fukuoka, Saga, Kagoshima, and Okinawa Pr ...
Amaranthaceae, Caryophyllales, Magnoliopsida, Magnoliophyta Amaranthus retroflexus   [Photo]
  [Redroot pigweed]
Almost entire Japan
Amaranthaceae, Caryophyllales, Magnoliopsida, Magnoliophyta Amaranthus spinosus
  [Spiny amaranth]
C to W Honshu, Shikoku, Kyushu, Ryukyus, and Ogasawara (Bonin) Islands.
Amaranthaceae, Caryophyllales, Magnoliopsida, Magnoliophyta Celosia argentea   [Photo]
  [Silver cock's comb]
Warm area (W Honshu, Kyushu, Shikoku, Okinawa)
Fabaceae, Fabales, Magnoliopsida, Magnoliophyta Amorpha fruticosa   [Photo]
  [Indigobush]
Most of entire Japan
Fabaceae, Fabales, Magnoliopsida, Magnoliophyta Astragalus sinicus   [Photo]
  [Chinese vetch,Milk vetch]
Almost entire Japan
Fabaceae, Fabales, Magnoliopsida, Magnoliophyta Leucaena leucocephala   [Photo]
  [White Popinac]
Ogasawara (Bonin) and southern Ryukyus.
Fabaceae, Fabales, Magnoliopsida, Magnoliophyta Lotus corniculatus var. corniculatus   [Photo]
  [Birdsfoot trefoil]
Almost entire Japan
Fabaceae, Fabales, Magnoliopsida, Magnoliophyta Medicago lupulina   [Photo]
  [Black medic]
Almost entire Japan
Fabaceae, Fabales, Magnoliopsida, Magnoliophyta Robinia pseudoacacia   [Photo]
  [False Acacia]
Yes Entire Japan
Fabaceae, Fabales, Magnoliopsida, Magnoliophyta Trifolium repens   [Photo]
  [White clover]
Almost entire Japan
Fabaceae, Fabales, Magnoliopsida, Magnoliophyta Ulex europaeus
  [Common gorse]
Kanagawa, Wakayama, and Shimane Prefs., and Shikoku.
Lythraceae, Myrtales, Magnoliopsida, Magnoliophyta Ammannia coccinea
  [Purple ammannia]
Middle to southwestern part of Japan mainland.
Casuarinaceae, Casuarinales, Magnoliopsida, Magnoliophyta Casuarina equisetifolia
  [Beefwood]
Yes Ryukyus and Ogasawara (Bonin) Islands.
Phytolaccaceae, Caryophyllales, Magnoliopsida, Magnoliophyta Phytolacca americana   [Photo]
  [Common pokeweed]
Most of entire Japan
Pinaceae, Pinales, Pinopsida, Pinophyta Pinus luchuensis   [Photo]
  [Luchu pine]
Ogasawara (Bonin) Islands.
Higher Taxa Common name [Scientific Name] Legal control Distribution in Japan

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