I came across this plant in Cornwall a few years ago but I've never managed to find its 'proper' botanical name so 'yellow flowered' it is !!!
The bright orangey yellow flowers make a spectacular show during mid to late Summer above trailing mats of dark green succulent leaves and are a good contrast to the usual fiery reds and pinks normally associated with Lampranthus. It needs a warm, sunny position and whilst hardy down to about -5 degrees C it doesn't like prolonged winter wet. Having said that, I planted one on a wall in my garden last year and it has emerged unscathed from the wettest winter I have ever known so maybe it's tougher than we think.