Yellow star thistle, Centaurea solstitialis, is an invasive plant that we should try to eliminate. The plant is native to Eurasia, although it is believed it was brought to California from South ...

When we see a plant and it’s prickly, we automatically assume it is a thistle and therefore it is a bad plant. The Oxford Dictionary defines a thistle as “A widely distributed herbaceous plant of the ...

Here we have another Jekyll and Hyde plant...one that is indeed “lovely fair,” but one which, at the same time, is a most loathsome invader. We received this specimen here in the herbarium, mailed to ...

When we see a plant and its prickly, we automatically assume it is a thistle and therefore it is a bad plant. The Oxford Dictionary defines a thistle as “A widely distributed herbaceous plant of the ...