Rosa omeiensis

Taxobox
name = "Rosa omeiensis"


image_width = 240px
image_caption = "Rosa omeiensis" f. "pteracantha"
regnum = Plantae
divisio = Magnoliophyta
classis = Magnoliopsida
ordo = Rosales
familia = Rosaceae
subfamilia = Rosoideae
genus = "Rosa"
species = "R. omeiensis"
binomial = "Rosa omeiensis"
binomial_authority = Rolfe

"Rosa omeiensis" is a species of "Rosa" native to central and southwestern China in the provinces of Gansu, Guizhou, Hubei, Ningxia, Qinghai, Shaanxi, Sichuan, Xizang, and Yunnan; it grows in mountains at altitudes of 700 to 4,400 m.

It is a shrub growing to 4 m tall, often very spiny. The leaves are deciduous, 3-6 cm long, with 5-13 leaflets with a serrated margin. The flowers are 2.5-3.5 cm diameter, white, with (unusually for a rose) only four petals. The hips are red to orange-yellow, 8-15 mm diameter, with persistent sepals, and often bristly.

There are four formae:
*"Rosa omeiensis" f. "omeiensis".
*"Rosa omeiensis" f. "glandulosa" T.T.Yü & T.C.Ku.
*"Rosa omeiensis" f. "paucijuga" T.T.Yü & T.C.Ku.
*"Rosa omeiensis" f. "pteracantha" Rehder & E.H.Wilson.

It is sometimes treated as a subspecies of the closely related species "Rosa sericea".

Cultivation and uses

"R. omeiensis" f. "pteracantha" is grown as an ornamental plant for its large, bright red thorns.

References

* [http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200011295 Flora of China: "Rosa omeiensis"]