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Rosa hirtula

From Wikipedia, the free encyclopedia

Rosa hirtula
At the Hakone Botanical Garden of Wetlands
Foliage
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Rosales
Family: Rosaceae
Genus: Rosa
Species:
R. hirtula
Binomial name
Rosa hirtula
Synonyms[1]
  • Rosa microphylla var. hirtula Regel in Trudy Imp. S.-Peterburgsk. Bot. Sada 5: 322 (1878)
  • Rosa roxburghii var. hirtula (Regel) Rehder & E.H.Wilson in C.S.Sargent, Pl. Wilson. 2: 320 (1915)

Rosa hirtula, the sanshou-bara or Hakone rose, is a species of flowering plant in the family Rosaceae.[2][3] It is found only in the vicinity of Mount Fuji and neighboring Mount Hakone in Japan, and is the town flower of Hakone.[4][5]

The pale pink, single flowers can be as wide as 7.5 cm (3 in).[3] Quite unusually for a rose, it can take on a tree-like growth form,[6] and reach up to 6 m (20 ft) tall. It has 4-9 pairs of leaves, the leaflets are each 1 to 3 cm (0.4 to 1.2 in) long. It flowers between May and June.[7]

The causal fungus of a rust disease of Rosa hirtula was thought to be a common species Phragmidium rosae-multiflorae. After a study in 2019, it was concluded that it was a species distinct from P. rosae-multiflorae; and a new name, Phragmidium satoanum, was proposed for it.[8]

References

[edit]
  1. ^ "Rosa hirtula (Regel) Nakai | Plants of the World Online | Kew Science". Plants of the World Online. Retrieved 30 September 2023.
  2. ^ Tsuyuzaki, Shiro (2021). "Rosa hirtula (Regel) Nakai". hokudai.ac.jp. Hokkaido University. Retrieved 6 August 2022. Sanshoubara (サンショウバラ, 山椒薔薇)
  3. ^ a b c "Rosa hirtula (S)". The Royal Horticultural Society. 2022. Retrieved 6 August 2022. Synonyms; Rosa roxburghii var. hirtula ... 1 suppliers
  4. ^ "Rosa hirtula (Regel) Nakai". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 6 August 2022.
  5. ^ "Fuji-Hakone-Izu". Japan National Tourism Organization. Ministry of the Environment, Government of Japan. Retrieved 6 August 2022. unique to the area ... sansho-bara
  6. ^ Ohba, Hideaki (2016). "840. Rosa hirtula". Curtis's Botanical Magazine. 33 (3): 226–234. doi:10.1111/curt.12152.
  7. ^ "Rosa roxburghii var. hirtula". treeflower.la.coocan.jp. Retrieved 15 February 2020.
  8. ^ Ono, Yoshitaka Wahyuno (2019). "Phragmidium satoanum, a new rust pathogen of Rosa hirtula in Japan". Mycoscience. 60 (4): 237–245.