This wonderful yellow/green spot in my garden is Euphorbia! I just love this plant and I always look forward to it's bright colour at this time of year. Euphorbia belong to a very interesting Genus of plants. The yellow 'flowers' you see are really bracts and not true flowers, although the plant does have unisexual parts. They are just very small. I have featured this plant on my other blog. I started that one in an attempt to keep track of the plants in my garden.
I guess I just like to be organized! Organized? Oh, wow! Did I say that?