Orthosiphon laurentii Orthosiphon marquesii Orthosiphon pseudornatus Orthosiphon welwitschii Orthosiphon adornatus var. oblongifolius Hemizygia chevalieri Hemizygia laurentii Orthosiphon adornatus var. angolensis Orthosiphon adornatus var. rotundifolius Orthosiphon welwitschii var. angolensis Orthosiphon adornatus Hemizygia welwitschii Orthosiphon adornatus var. chlorococcus
World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024