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]
| 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 | |
| Synonyms[1] | |
| |
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]
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Unripe hip -
![Bark tends to peel[3]](//upload.wikimedia.org/wikipedia/commons/thumb/c/cc/Rosa_hirtula1.jpg/180px-Rosa_hirtula1.jpg)
Bark tends to peel[3] -
Detail of petal venation and anthers
![Bark tends to peel[3]](/wiki/File:Rosa_hirtula1.jpg)
References
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