genus Syncolostemon (Lamiaceae)

The genus  Syncolostemon E. Mey. ex Benth. is revised and its relationship with  Hemizygia (Benth.) Briq.f is discussed. A new species,  S. comptonii Codd is described and the following new combinations are made: S. parviflorus var. lanceolatus (Guerke) Codd  (= S . lanceolatus Guerke) and  S. latidens (N.E. Br.) Codd ( = Orthosiphon latidens N.E. Br.).