Subgen. I. Porphyrantha (Fenzl) McNeill

Subgen. II. Arenaria

• Sect. Africanae McNeill

• Sect. Arenaria

• Sect. Grandiflorae McNeill

• Sect. Orientales McNeill (incl. sect. Occidentales McNeill)

• Sect. Planosepalae McNeill

• Sect. Plinthine (Rchb.) Pau

• Sect. Pungentes McNeill

• Sect. Rariflorae F.N. Williams

• Sect. Rotundifoliae McNeill