Flower NameJapanese dock
Formal NameRumex japonicus
Alias羊蹄, Japanese dock, Gishi-gishi
HabitatJapan, Korean Peninsula, China, Taiwan, Russia
Morphlarge perennial wild grass
Japanese dock or Yotei (scientific name: Rumex japonicus) is native to Japan, Korean Peninsula, China, Taiwan, Russia, and it is a large perennial wild grass of the family Polygonaceae. The thick stem stands upright and branches well at the top. Root leaf has long oval shape, long pattern and crowded. From spring to summer, put out a conical inflorescence from the tip of the branch and attach a flower consisting of six green calyxes. However, there are no petals. Of the six calyxes after flowers, three inner flower pieces grow larger. The flower piece is a triangle and there are small saw teeth on its edge. One light green fruit is formed in one inner flower piece. Three inner flowering pieces are joined together. The color of the inner fruit changes from green to brown.
common name:Japanese dock or Yotei ,scientific name: Rumex japonicus, Also known as: Japanese dock, Gishi-gishi, distribution Distribution: Hokkaido to Okinawa Nationwide, Environment in Japan: Wetland in the wilderness and roadside, height of the road: 60 to 100 cm, leaf length: 10 to 25 cm, leaf shape: oblong ellipse, leaf margin: wavy, sexual stature, petal: none, calyx: 6 , Flowering period: June to August, flower color: green, fruit color: green → brown, breeding method: seeds and rhizomes, features: small saw teeth at the edge of the inner flower piece, application: young buds are edible, roots are crude drugs.
Flower typeActinomorphic Flower
Petal shapeno petal
Flowering placePlain/fleet Beach Low mountain
SeasonJun Jul Aug
Height60 ~ 100 [cm]
Diameter0.3 ~ 0.6