Each flower head is up to 2 cm long and about 1.5 cm wide ... MCPB can be used on young rosettes, or else 2,4-D or MCPA on older plants. In parts of Hawkes Bay, we have found populations of slender ...

It is called a thistle cup because its shape is designed to look like the head of a thistle flower. The base is rounded and the rim turns outwards at the edge, which copies the shape of the flower.