Question: In between Azolla and Platycarya which one is native to eastern Asia in China, Korea, and Japan?

full_context: Document 1: Aldrovanda vesiculosa: Aldrovanda vesiculosa, commonly known as the waterwheel plant, is the sole extant species in the flowering plant genus "Aldrovanda" of the family Droseraceae. The plant captures small aquatic invertebrates using traps similar to those of the Venus flytrap. The traps are arranged in whorls around a central, free-floating stem, giving rise to the common name. This is one of the few plant species capable of rapid movement.
Document 2: Salvinia molesta: Salvinia molesta, commonly known as giant salvinia, or as kariba weed after it infested a large portion of the reservoir of the same name, is an aquatic fern, native to south-eastern Brazil. It is a free floating plant that does not attach to the soil, but instead remains buoyant on the surface of a body of water. The fronds are 0.5–4 cm long and broad, with a bristly surface caused by the hair-like strands that join at the end to form eggbeater shapes. They are used to provide a waterproof covering. These fronds are produced in pairs also with a third modified root-like frond that hangs in the water.
Document 3: Salvinia: Salvinia, a genus in the family Salviniaceae, is a floating fern named in honor of Anton Maria Salvini, a 17th-century Italian scientist. Watermoss is a common name for "Salvinia". The genus was published in 1754 by Jean-François Séguier, in his description of the plants found round Verona, "Plantae Veronenses" Twelve species are recognized, at least three of which ("S. molesta", "S. herzogii", and "S. minima") are believed to be hybrids, in part because their sporangia are found to be empty.
Document 4: Kalopanax: Kalopanax septemlobus, common names castor aralia and tree aralia, is a deciduous tree in the family Araliaceae, the sole species in the genus "Kalopanax". It is native to northeastern Asia, from Sakhalin and Japan west to southwestern China. It is called "cìqiū" (刺楸 ) in Chinese, "eumnamu" (음나무 ) in Korean, and "harigiri" (ハリギリ ; 針桐 ) in Japanese.
Document 5: Platymiscium: Platymiscium is a genus of legume in the Fabaceae family, and was recently assigned to the informal monophyletic "Pterocarpus" clade within the Dalbergieae. It has a Neotropical distribution, from northern Mexico to southern Brazil. "Platymiscium" is the only genus in the family with opposite leaves in all its species. Its wood has various uses, mostly for constructions and furniture.
Document 6: Podocarpus macrophyllus: Podocarpus macrophyllus is a conifer in the genus "Podocarpus", family Podocarpaceae. It is the northernmost species of the genus, native to southern Japan and southern and eastern China. Common names in English include yew plum pine, Buddhist pine and fern pine. "Kusamaki" (クサマキ) and "inumaki" (犬槇) are Japanese names for this tree. In China, it is known as 羅漢松 or "luóhàn sōng", which literally means "arhat pine".
Document 7: Wolffia arrhiza: Wolffia arrhiza is a species of flowering plant known by the common names spotless watermeal and rootless duckweed, belonging to the Araceae, a family rich in water-loving species, such as "Arum" and "Pistia". It is the smallest vascular plant on Earth. It is native to Europe, Africa, and parts of Asia, and it is present in other parts of the world as a naturalized species. It is an aquatic plant which grows in quiet water bodies such as ponds. The green part of the plant, the frond, is a sphere measuring about 1 mm wide, but with a flat top that floats at the water's surface. It has a few parallel rows of stomata. There is no root. The plant produces a minute flower fully equipped with one stamen and one pistil. It often multiplies by vegetative reproduction, however, with the rounded part budding off into a new individual. In cooler conditions the plant becomes dormant and sinks to the bed of the water body to overwinter as a turion. The plant is a mixotroph which can produce its own energy by photosynthesis or absorb it from the environment in the form of dissolved carbon.
Document 8: Stachyurus: Stachyurus is the only genus in the flowering plant family Stachyuraceae, native to the Himalayas and eastern Asia. They are deciduous shrubs or small trees with pendent racemes of 4-petalled flowers which appear on the bare branches before the leaves. The plants have leaves with serrate margins. Stachyuraceae contains a single genus with eight species.
Document 9: Azolla: Azolla (mosquito fern, duckweed fern, fairy moss, water fern) is a genus of seven species of aquatic ferns in the family Salviniaceae. They are extremely reduced in form and specialized, looking nothing like other typical ferns but more resembling duckweed or some mosses.
Document 10: Azolla pinnata: Azolla pinnata is a species of fern known by several common names, including mosquitofern, feathered mosquitofern and water velvet. It is native to much of Africa, Asia (Brunei Darussalam, China, India, Japan, Korea, and the Philippines) and parts of Australia. It is an aquatic plant, its frond floating upon the surface of the water. It grows in quiet and slow-moving water bodies, because swift currents and waves break up the plant.
Document 11: Stewartia: Stewartia (sometimes spelled Stuartia) is a genus of 8-20 species of flowering plants in the family Theaceae, related to "Camellia". Most of the species are native to eastern Asia in China, Japan, Korea, Laos, Myanmar, Thailand, and Vietnam, with two ("S. malacodendron, S. ovata") in southeast North America, from Virginia and Kentucky south to Florida and Louisiana.
Document 12: Salvinia auriculata: Salvinia auriculata is a species of plant in the Salviniaceae known by the common names eared watermoss, African payal, and butterfly fern. It is native to the Americas from Mexico south to Argentina and Chile. It is cultivated as an ornamental plant and it has become naturalized in the wild in some places.
Document 13: Platycarya: Platycarya is a genus of flowering plants in the family Juglandaceae, usually treated as comprising a single species Platycarya strobilacea, though one to two additional species are accepted by some authors. It is native to eastern Asia in China, Korea, and Japan.
Document 14: Pleioblastus: Pleioblastus is a, East Asian genus of monopodial bamboos in the grass family. They are native to China and Japan, and naturalized in scattered places in Korea, Europe, New Zealand, and the Western Hemisphere.
Document 15: Paulownia: Paulownia is a genus of six to 17 species (depending on taxonomic authority) of flowering plants in the family Paulowniaceae, related to and sometimes included in the Scrophulariaceae. They are present in much of China, south to northern Laos and Vietnam and are long cultivated elsewhere in eastern Asia, notably in Japan and Korea. They are deciduous trees 12 – tall, with large, heart-shaped leaves 15–40 cm across, arranged in opposite pairs on the stem. The flowers are produced in early spring on panicles 10–30 cm long, with a tubular purple corolla resembling a foxglove flower. The fruit is a dry capsule, containing thousands of minute seeds.
ground_truth: Platycarya