Glaucous Dog Rose
- Name also: Glaucous Dog-rose, Whitish-stemmed Briar
- Family: Rose Family – Rosaceae
- Growing form and height: Shrub. 2–4 m (6–13 ft.).
- Flower: Regular, large, 4–5 cm (1.5–2 in.) across. Sepals 5, lobed. Petals 5, free, pink or white, notched. Stamens numerous. Carpels free, many. Flowers solitary or in 2–4-flowered racemes.
- Leaves: Alternate. Stipulate, stalked, odd-pinnate. Leaflets five to seven, 2–3.5 cm (0.8–1.4 in.) long, elliptic to obovate, hairless, toothed, teeth tipped.
- Buds: Cone-shaped, green–reddish.
- Fruit: Oval, hairless, red hip containing several achenes.
- Habitat: Dryish, open woodland, rich forest margin thickets, pastures, roadsides. Rarely an ornamental.
- Flowering time: June–July.
The stems of glaucous dog rose are stout and arching, and covered with rigid, hooked prickles. This species is very much alike dog rose (R. canina), a rare southern species occurring only in the Åland Islands. Dog rose is sometimes grown as an ornamental. Both glaucous dog rose and dog rose are very variable species and, hence difficult to identify.
Roses and briars (Rosa spp.) are large-flowered, prickly shrubs. Their leaves are imparipinnate. The actual fruits are achenes which, however, are not visible, but enclosed by the enlarged receptacle, the whole being called a hip. The genus comprises between 100 and 250 species, depending on the defining criteria. They are distributed over the temperate regions of the Northern hemisphere. Roses have been cultivated in China and the eastern Mediterranean at least for 4,000–5,000 years.
Hairy Dog Rose
Rosa dumalis ssp. dumalis and Rosa dumalis ssp. coriifolia were earlier regarded as subspecies of glaucous dog rose. Today they are classified as own species Rosa dumalis and Rosa caesia. The main difference between these species is seen in leaflets; Glaucous dog rose’s leaflets are glaucous, of course. Hairy dog rose’s leaflets are (only) a bit hairy, especially on underside.
NOT TRANSLATED YET. Orjanruusuja muistuttavaa koiranruusua meillä voi tavata luonnonvaraisena vain Ahvenanmaalla. Tuntomerkkejä: käyrät, vahvat piikit; kukat vaaleanpunaisia tai valkoisia; kukinnan jälkeen taapäin kääntyvät liuskaiset verholehdet, jotka putoavat ennen kiulukoiden kypsymistä; kiulukat pitkänomaisia, myöhään (lokakuussa) kypsyviä.