Lotus berthelotii is such a striking plant that for many - including myself - it does not appear to be a species of Lotus at all. Incidentally the word 'Lotus' has been applied to several other plants including certain Egyptian water lilies such as Nelumbo.
Lotus berthelotii seems best used as a trailing plant.
My garden, 11 June, 2016
|The same plant in close-up|