Rosa spinosissima L.

Foodplant / feeds on
adult of Cryptocephalus aureolus feeds on pollen of Rosa pimpinellifolia
Remarks: season: (4-)5-6(-9)

In Great Britain and/or Ireland:
Plant / epiphyte
fruitbody of Dendrothele griseocana grows on dead stem of Rosa pimpinellifolia

Foodplant / parasite
sporangium of Peronospora pimpinellifolia parasitises live Rosa pimpinellifolia

Foodplant / pathogen
sporangium of Peronospora sparsa infects and damages live leaf of Rosa pimpinellifolia

Foodplant / parasite
telium of Phragmidium rosae-pimpinellifoliae parasitises live Rosa pimpinellifolia

Fungus / parasite
Podosphaera pannosa parasitises Rosa pimpinellifolia

Foodplant / internal feeder
larva of Rhagoletis alternata feeds within fruit of Rosa pimpinellifolia
Remarks: Other: uncertain

Shrubs low, ca. 1 m tall. Branches spreading or curved, glabrous; branchlets of present year purple-brown or red-brown; prickles dense to sparse, terete, straight or slightly curved, to 4 mm, fine, bristlelike, abruptly broadening at base, intermixed with smaller bristles. Leaves including petiole 4–8 cm; stipules mostly adnate to petiole, free part ovate, margin entire or serrate, teeth often glandular apically; rachis and petiole sparsely prickly and glandular-pubescent; leaflets (5–)7–9(–11), oblong, oblong-ovate, or suborbicular, 1–2.2 × 0.6–1.2 cm, glabrous, base rounded or broadly cuneate, margin simply serrate or partly doubly serrate, teeth glandular apically when young, apex rounded-obtuse or acute. Flowers solitary, or 2 or 3 and fasciculate, axillary, 2–6 cm in diam.; pedicel 1.5–3.5 cm, sparsely pubescent or glabrescent, glandular-pubescent or not; bracts absent. Hypanthium subglobose, glabrous. Sepals lanceolate, abaxially glabrous, adaxially pubescent, margin entire, apex acuminate or caudate-acuminate. Petals 5, white, pink, or yellowish, broadly obovate, base broadly cuneate, apex emarginate. Styles free, much shorter than stamens, pubescent. Hip black or dark brown, subglobose, 1–1.6 cm in diam., glabrous, shiny, with persistent sepals; pedicel to 4 cm, often glandular. Fl. May–Jun, fr. Oct–Sep.

Xinjiang [Russia (Siberia); C and SW Asia, Europe].

Scrub in forests, grassy slopes, river sides; 1100--2300 m.

Rosa spinosissima L. Sp. PI. 49 1". 1753
Rosa cinnamomea L. Syst. Nat. ed. 10. 1062. 1759. Not R. cinnamomea L. 1753.
Stem slender, 1-2 m. high, brown, terete, armed with short curved prickles; floral branches 1-2 dm. long, often unarmed; stipules dilated, more or less convolute, about 2 cm. long, dentate on the margins, finely puberulent; rachis and petiole tomentulose; leaflets 5 or 7, rarely 3, elliptic, simply serrate, dull-green, sparingly puberulent above, densely-pubescent beneath, 1.5-4 cm. long; flowers solitary or few together; pedicels 2-3 cm. long, glabrous; hypanthium globose, glabrous, in fruit 12-15 mm. thick, scarlet; petals dark rose-colored, 2-2.5 cm. long, obcordate; sepals lanceolate, attenuate, 2 cm. long, glabrous on the back, tomentose on the margins, in fruit erect and persistent; styles distinct, persistent, not exserted; achenes inserted both in the bottom and on the sides of the hypanthium.
Type locality: Europe.
Distribution: Europe and northern Asia; cultivated and occasionally escaped in the eastern states and Wisconsin.