- Name also: Japanese Rose, Ramanas Rose
- Family: Rose Family – Rosaceae
- Growing form and height: Shrub. 0.3–2 m (1–7 ft.).
- Flower: Regular, large, approx. 6–10 cm (2.5–4 in.) across. Sepals 5. Petals 5, free, purplish-pink or white. Carpels free, many. Stamens numerous. Flowers solitary or in groups of 2 or 3, stalks with glandular hairs.
- Leaves: Alternate. Stipulate, stalked, odd-pinnate. Leaflets five to nine, 2–5 cm (0.8–2 in.) long, elliptic to oblong, serrate, hairless and wrinkled above, densely hairy and greyish beneath.
- Buds: Cone-shaped, brown.
- Fruit: Oval to rounded, hairless, red hip containing several achenes.
- Habitat: Sandy and rocky seashores, waterside meadows, waste ground, roadsides. Originally an ornamental, fairly often an escape.
- Flowering time: June–September.
- Harmfulness: Extremely harmful invasive species.
The stems and branches of rugosa rose are densely covered in straight, hairy prickles and bristles. The hips are very rich in vitamin C. This species is not native in Finland but was originally introduced as an ornamental. It is an oceanic species native to Northeast Asia. It suckers vigorously forming extensive, dense thickets. Thrives particularly well on seashores and is very salt-tolerant. The seeds also stay viable for long in salt water. In many places, for instance on the coasts near Hanko, South-West Finland, rugosa rose has become quite a nuisance.