Hiroshi Hara

Syringa reticulata, the Japanese tree lilac, is a species of flowering plant in the family Oleaceae. It is native to eastern Asia, and is grown as an ornamental in Europe and North America.

Ludwigia adscendens, the water primrose, is a species of flowering plant in the evening primrose family. Its native distribution is unclear. It is now a common weed of rice paddies in Asia and occurs also in Australia and Africa, but may have originated in South America. This plant is a perennial floating herb with white spongy buoys, and can float on water surface as well as creep over the surface of wetlands. The plant has simple leaves with elliptic blades, which are 0.4–7 cm long and 0.7–3 cm wide. Its petioles are 0.5–1.0 cm short. Its cream flowers emerge singly at axils, and each have

Ligularia dentata, the summer ragwort or leopardplant, is a species of flowering plant in the genus Ligularia and the family Asteraceae, native to China and Japan.

Acer nipponicum, occasionally called the Nippon maple, is a species of maple native to Japan. It belongs to the Acer section Parviflora.

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Trema tomentosum, also known as T. tomentosa and commonly called poison peach, is a shrub or tree in the family Cannabaceae native to the Indian subcontinent, south east Asia, through the islands of the south west Pacific, and the east coast and northern half of Australia.

Monotropastrum humile is a species of myco-heterotrophic plant of the family Ericaceae, distributed throughout eastern Asia, from the Himalayas to the Islands of Japan. It lacks chlorophyll and is therefore unable to perform photosynthesis as most plants do; instead it gains sugars and nutrients from mycorrhizal fungi. It is sometimes referred to as Cheilotheca macrocarpa.

Actaea asiatica, commonly known as Asian baneberry, is a species of baneberry that ranges throughout Asia. The flowers are ranges from gray to white. The berries are black-purple. The plant is extremely poisonous to humans. The fruits are eaten by birds which disperse the seeds.

Rubia argyi is a species of flowering plant of the family Rubiaceae. Its common names may include East Asian madder. It occurs in southern and eastern China, Taiwan, Japan, and Korea. Rubia argyi is a herbaceous, perennial vine. The stem can grow to a length of 2 m (6 ft 7 in) or more.

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Ludwigia sedioides, commonly known as mosaic flower and false loosestrife, is a herbaceous perennial plant of the family Onagraceae. It has yellow flowers that bloom from June to August. Native to Brazil and Venezuela, its habitat includes wet, swampy localities. It may be invasive in some areas.

Ludwigia sedioides, commonly known as mosaic flower and false loosestrife, is a herbaceous perennial plant of the family Onagraceae. It has yellow flowers that bloom from June to August. Native to Brazil and Venezuela, its habitat includes wet, swampy localities. It may be invasive in some areas.

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Betula chichibuensis, commonly known as Chichibu birch (Chichibu-Minebari in Japanese), is a species of birch native exclusively to limestone outcrops in the Okuchichibu and Kitakami Mountains of central and northeast Honshu, Japan. The tree is rated as Critically Endangered on the IUCN Red List due to its extreme rarity and limited range. In 1993, only 21 B. chichibuensis trees existed in the wild. Although several other small populations of the tree were discovered in the 2010s, including the Kitakami populations, the Chichibu birch remains very rare. Ex situ conservation efforts to prevent

Peltoboykinia is a genus of flowering plants belonging to the family Saxifragaceae. Its native range is southeastern China and Japan.

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Ludwigia peruviana, with the common names Peruvian primrose-willow or Peruvian water primrose, is an aquatic, sometimes deciduous species of flowering plant in the evening primrose family. It can grow to approximately 12 feet (3.7 m) in height. While native to Peru, it has been introduced in many other countries for its attractive simple yellow flowers, it is now a common weed in swampy areas around the world.

Hemerocallis yezoensis (Japanese: エゾキスゲ, romanized: ezokisuge, Russian: Красоднев иезский, romanized: Krasodnev iyezskiy) is a species of plant in the genus Hemerocallis, native to eastern Hokkaido and the southernmost extremities of the Kuril Islands.

Allium togashii is a plant species endemic to Japan. It is known only from Shikoku: Kankakei, and Azuki, although it is cultivated in other counties for its attractive floral arrays. It is a small, delicate plant with thin scapes and a feathery-looking umbel of very pale lavender flowers.

Zabelia tyaihyoni, synonym Abelia mosanensis, the fragrant abelia, is a species of deciduous shrub in the honeysuckle family Caprifoliaceae. Growing up to 2 meters high and wide, it is hardier than many related species, surviving temperatures as low as −20 °C (−4 °F). The tubular blooms are pinkish-white and highly scented, appearing in late Spring. The glossy green leaves turn red in autumn before falling. Zabelia tyaihyoni is a popular garden shrub. The cultivar 'Korean Spring' (under the name Abelia mosanensis) has gained the Royal Horticultural Society's Award of Garden Merit.

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Tricarpelema giganteum is a monocotyledonous herbaceous plant in the family Commelinaceae. It is native to eastern India and Bhutan. Tricarpelema giganteum serves as the type species for the genus.

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Persicaria barbata, commonly known as bearded knotweed, is a species of flowering plant in the family Polygonaceae. It is native to the Arabian Peninsula and much of tropical and subtropical Asia, and has also been introduced to parts of Africa and the Pacific islands. The plant typically grows in seasonally dry tropical regions, where it occurs as an erect or sometimes prostrate annual herb, 30–60 cm tall, with hairless, line-grooved stems and lance-shaped leaves up to 15 cm long. In some descriptions it is noted as a perennial, producing robust, loosely branched stems 40–90 cm tall from a

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