These flowers are growing from a crop of winter broccoli. Perhaps it was the fickle spring weather this year that contributed to the short window of time edible broccoli buds were available and the proliferation of weeds in the gardens.
This year, I observed the strong resemblance among the flowers of broccoli, kale, brussels sprouts and probably all other cruciferous plant flowers. When I checked my dictionary for the spelling of cruciferous, I learned these plants are all in the mustard family. The last few years, I’ve been trying to purchase organic, non-hybrid broccoli plants, that might come true to seed. Time will tell if the seed will produce plants that will grow over the winter and produce broccoli florets next spring.