Lobostemon latifolius Lobostemon spicatus Lobostemon caudatus Lobostemon alopecuroideus Lobostemon eriostachyus Echium alopecuroideum Echium caudatum Echium eriostachyum Echium latifolium Echium spicatum
World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024