Sedum sexangulare
watch-chain stonecrop
Crassulaceae
Characteristics: Bright yellow flowers with a nice mix of green and copper when not in bloom. More rusty-coloured in dry, hot weather. Sexangulare refers to the six angles of the leaves. 5 petals and 5 sepals. A low-growing, spreading sedum.
Growing conditions: Good drainage and sun. Can grow without irrigation. Suitable for the top of a wall or slope, does nicely in pots. Not invasive.
Limitations: Fire away!