Allamanda cathartica 'Floreoplena' (Apocynaceae)
This double flowered Allamanda has been in flower for months and is showing no sign of slowing down in bud production. It seems to like growing against a brick wall which retains some heat long after the sun has set. I grow a number of different varieties grouped together in pots and they remain happy to grow in this way without becoming stressed by being pot bound. The double form has a number of cultivars including 'Halley's Comet' and 'Stansill's Double', though most seem to be lumped together under the name 'Williamsii' which is described as being both a semi double or a large single. Please explain? It is also described as having fragrant flowers though this is too subtle for me to notice.Perhaps more noticeable at night?