Smallflower Sweetbrier

In Great Britain and/or Ireland:
Fungus / parasite
Podosphaera pannosa parasitises Rosa micrantha

Rosa micrantha Borrer; Smith, Engl. Bot. pi. 2490. 1813
Stems branched, 1-2 m. high, terete, armed with uniform, hooked, flattened prickles 5-10 mm. long; leaves 5-7-foliolate; stipules adnate, 1-1.5 cm. long, the lower narrow, the upper dilated, pubescent and glandular beneath, glandular-ciliate on the margins; petioles and rachis pubescent, and glandular-hispid, rarely prickly; leaflets broadly ovate, rounded at the base, short-acuminate at the apex, 1-3 cm. long, more or less pubescent on both sides, and densely glandular-pruinose beneath, doubly serrate with gland-tipped teeth; flowers 1-4 together, leaf y-bracted ; pedicels glandular-hispid, 1-2 cm. long; hypanthium narrowly elliptic, tapering at both ends, glabrous, in fruit 8-10 mm. thick, 15-20 mm. long; sepals lanceolate, caudate-attenuate, 12-18 mm. long, glandular-hispid on the back, tomentose within, more or less lobed; petals 10-15 mm. long, obcordate, rose-colored; styles distinct, glabrous, at last slightly exserted; achenes inserted both in the bottom and on the sides of the hypanthium.
Type locality: Not given, probably near London.
Distribution: Roadsides, from Massachusetts and New York to South Carolina and Texas; in Oregon and Washington ; escaped from cultivation and sometimes naturalized ; native of Europe.

Rosa micrantha, the small-flowered sweet briar, is a species of flowering plant in the family Rosaceae. It is native to most of Europe, the Atlas Mountains of Africa, the Caucasus region, Turkey, Lebanon, and Syria, and it has been introduced to eastern North America, Argentina, and New Zealand. A shrub reaching 3.5 m (11 ft), it is not readily available in commerce.

Close-up of flower

Flowers can be pink

Flowers and foliage

Hips

Hips remain after leaves abscise

Botanical illustration