9. Fragaria. Flower as in Potentilla. Receptacle much enlarged and pulpy in fruit.
10. Potentilla. Petals 5 (rarely 4) conspicuous. Calyx lobes as many, with an alternating set of bractlets. Stamens and achenes numerous; the latter heaped on a dry receptacle. Styles commonly more or less lateral, deciduous or not enlarging in fruit.
11. Sibbaldia. Petals minute; stamens and achenes 5–10; otherwise as Potentilla.
II. Ovaries inferior or enclosed in the calyx-tube.
Tribe V. POTERIEÆ. Pistils 1–4, becoming achenes, completely enclosed in the dry and firm calyx-tube, which is constricted or nearly closed at the throat. Herbs with compound or lobed leaves. Petals often none.
12. Alchemilla. Calyx urceolate, bracteolate. Petals none. Stamens 1–4. Flowers minute, clustered.
13. Agrimonia. Calyx turbinate, with a margin of hooked prickles. Stamens 5–12. Flowers yellow, in long racemes.
14. Poterium. Calyx lobes petaloid; tube 4-angled, naked. Petals none. Flowers densely capitate or spicate.
Tribe VI. ROSEÆ. Pistils many, becoming bony achenes, enclosed in the globose or urn-shaped fleshy calyx-tube, which resembles a pome. Petals conspicuous. Stamens numerous.
15. Rosa. The only genus. Prickly shrubs with pinnate leaves.