Luc Brouillet

Shrubs or subshrubs; usually armed, rarely unarmed. Leaves alternate, imparipinnately compound or 3-foliate [simple]; stipules persistent, sometimes caducous [absent], adnate to petiole base or free, auricles free; venation pinnate. Flowers: perianth and androecium perigynous; epicalyx bractlets absent; hypanthium ovoid, oblong, globose to cupulate or urceolate, rarely obovoid or hemispheric, ˂with or without distinct necks˃; torus usually absent, conic if present; carpels 3–110+, styles terminal, distinct, rarely connate; ovule 1, apical. Fruits accessory; aggregated achenes enclosed within hypanthium (hip); styles persistent, not elongate.

Genus 1, species ca. 140 (33 in the flora): North America, Mexico, Eurasia, Africa, Pacific Islands, Australia; introduced widely worldwide.

The base chromosome number for Roseae is x = 7.

Lower Taxon

• Rosa Linnaeus