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Rosa

(Genus)

Overview

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Shrubs, erect, diffuse, or climbing, mostly prickly, bristly, or rarely unarmed, pubescent, glandular-pubescent, or glabrous. Leaves alternate, odd pinnate, rarely simple; stipules adnate or inserted at petiole, rarely absent. Flowers solitary or in a corymb, rarely in a compound corymb or a panicle; bracts solitary, several, or absent. Hypanthium globose, urceolate, or cupular, constricted at neck. Sepals 5, rarely 4, quincuncial: 2 outer, 2 inner, and 1 middle, margin entire or variously pinnately lobed. Petals 5, rarely 4, imbricate, white, yellow, pink, or red; disc inserted at mouth of hypanthium. Stamens numerous, in several whorls, inserted at disc. Carpels free, numerous, rarely few, inserted at margin or base of hypanthium, not or rarely stalked; ovule pendulous; styles terminal or lateral, exserted or not, free or connate at upper part. Fruit a hip, formed from fleshy hypanthium. Achenes numerous, rarely few, on adaxial surface of fleshy hypanthium, woody. Seed pendulous. x = 7.

About 200 species: widely distributed from subtropical to cold-temperate regions; 95 species (65 endemic) in China.[1]

Photos

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Taxonomy

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The Genus Rosa is further organized into finer groupings including: