Harutoranoo

Bistorta tenuicaulis var. tenuicaulis

  • Harutoranoo
  • Harutoranoo
  • Harutoranoo
  • Harutoranoo
  • Flower name
    Harutoranoo
  • Scientific name
    Bistorta tenuicaulis var. tenuicaulis
  • Alias春虎の尾
  • Place of originJapan
  • Place of floweringLow mountains
  • Flowering seasonApril, May

What is Harutoranoo

Harutoranoo (scientific name: Bistorta tenuicaulis var. tenuicaulis) is a perennial herb endemic to Japan and belonging to the genus Bistorta of the family Polygonaceae. It is one of the first plants to flower in spring, called "spurifimere. Its alias "Irohasou" is based on the first letter of Iroha-ni-hoheto, which means "Iroha grass," because of its early blooming period. Ibuki tranoderma of the same genus is a taller plant, while Hal tranoderma is shorter, 5 to 20 cm. The flower stalks are erect and separate from the rhizomatous leaves, and in April to May, the tips of the short petioles produce sepals that look like white flowers with an inflorescence length of 1 to 3 cm and an inflorescence diameter of 1 cm. The flowers have no petals and the sepals have five deep lobes. There are eight stamens, which protrude. The anthers are dark purple. There are three flower stalks. The fruit after the flower is a shiny, brown, thin, broadly oval-shaped fruit.

Common name: Harutoranoo, scientific name: Bistorta tenuicaulis var. tenuicaulis, native to Japan, habitat: Honshu, Shikoku and Kyushu, living environment: deciduous forests in mountainous areas, Flowering season: April to May, Flowering place: at the tip, Inflorescence length: 1 to 3 cm, Inflorescence diameter: 1 cm, Petiole: short, Flower color: white, Petal: absent Inflorescence length: 1-3 cm, inflorescence diameter: 1 cm, petiole: short, flower color: white, petals: absent, calyx: 5 deeply lobed, stamens: 8 and protruding, anther color: dark purple, flower column: 3, fruit type: thin, fruit shape: broad oval, fruit color: shiny brown.


  • Order
    Caryophyllales
  • Family
    Polygonaceae
  • Genus
    Bistorta
  • Species
    B. tenuicaulis var. tenuicaulis
  • Type of flower
    Radial symmetrical flower
  • Array of flower
    Gross inflorescence
  • Petal shape
    without
  • Leaf type
    lanceolate
  • Edge of the leaf
    Entire
  • Life typePerennial plant
  • Flower colorsWhite
  • Colors of the leavesGreen
  • Fruit colorOrange
  • Height5.0 ~ 20.0 cm
  • Diameter of flower1.0 ~ 1.0 cm

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