Five new species of Calandrinia (Portulacaceae) from Western Australia with additional information on morphological observations
Four new Western Australian species in Calandrinia section Pseudodianthoideae von Poellnitz are described as: C. flava Obbens C. tholiformis Obbens, C. sculpta Obbens & J.G.West and C. vernicosa Obbens. A fifth species of uncertain sectional placement is described as C. pentavalvis Obbens. One of the new species is found solely in coastal areas of the South West Botanical Province, one occurs within the Eremaean Botanical Province while the remaining three occur in both these regions. Notes on some field and laboratory observations of the morphology of Calandrinia are discussed.