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.

Distribution

North America, Mexico, Eurasia, Africa, Pacific Islands, Australia, widely worldwide

Discussion

Genus 1, species ca. 140 (33 in the flora).

The base chromosome number for Roseae is x = 7.

Selected References

None.

Lower Taxa

Rosa

"thin" is not a number.