That dark purple rosette-shaped succulent is the eye-catching Aeonium arboreum
'Zwartkop.' The orange and green multi-cylindrical-shaped succulent to the left is Euphorbia tirucalli
'Sticks on Fire.' The dark 'Zwartkop' can reach a height of 4 feet, on bare stalks. It looks best when grouped with succulents or companion plants that provide contrast, like the 'Sticks on Fire,' pictured here, or chartreuse plants.