Rosa hirtula information

Rosa hirtula
	At the Hakone Botanical Garden of Wetlands
	Foliage
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Rosales
Family:	Rosaceae
Genus:	Rosa
Species:	R. hirtula
Binomial name
	Rosa hirtula; (Regel) Nakai
Synonyms
	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]

Unripe hip
Bark tends to peel^[3]
Detail of petal venation and anthers

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

[Powo-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)

[RHS_263511-3] "Rosa hirtula (S)". The Royal Horticultural Society. 2022. Retrieved 6 August 2022. Synonyms; Rosa roxburghii var. hirtula ... 1 suppliers

[732801-1-4] "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.

[tree-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.

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