A revision of the Sphaerolobium fornicatum complex (Leguminosae: Mirbelieae) from south-west Western Australia
In this paper the Sphaerolobium fornicatum Benth. complex is revised. The name S.�fornicatum is correctly applied to collections with very slender stems and opposite phyllotaxis from near the south coast of Western Australia and two new, closely allied species, S.�calcicola R.Butcher and S.�hygrophilum R.Butcher, are described and distinguished from S.�fornicatum. A morphometric study shows that these three taxa are distinct and a UPGMA classification and MDS ordination of selected specimens is presented. Illustrations, distribution maps and full descriptions of the taxa within this complex are provided, together with a taxonomic key to these and other species of Sphaerolobium possessing distinctly black-punctate calyces.