1. Leaves pinnatifid ... 2.

– Leaves entire ... 3.

2. Plants perennial, leaves dissected to numerous lanceolate lobes ... Polemonium L.—Jacob's ladder.

– Annual plants, leaves with narrow lobes ... Gilia L.—Gilia.

3(1). The compact inflorescence is surrounded by leaflike bracts ... Collomia Nutt.—Collomia.

– The sparse inflorescence without specialised bracts ... Plox L.—Phlox, Sweet-william.