I recently observed a Goldenrod Crab spider, Misumena vatia, on a yellow flower. Since then, I started to check man similar flowers and found a lot of these spiders. The photos shown here were all taken within less than 100 m radius; only a few photos are posted, and I did not take photos of all spiders, as there over 10 spiders in a small area.
In some cases, the spiders bent one or two petals (as seen in some of the photos) and formed a hiding place (the petals appeared to be held in place with silk?). In other flowers, the spider sat in plain view, or were hiding behind the flower.
I did not find more than one spider per flower if there were other spiders, they were not in plain view, at least I did not see them). I did see more than one spider per plant, just not on the same flower.
This species may have different colors, but all of the ones I saw were yellow and blended well with the yellow flowers.
They are nice looking spiders!
Hunting on a spiderwort
Goldenrod Crab Spider seen on back door of WW Knight Nature Center.
White female crab spider on a blue dick flower, Dichelostemma capitatum. Grassy slope into fairly flat field.
Misumena vatia is a species of crab spider with holarctic distribution. In North America, where it is the largest and best-known flower spider, it is called the goldenrod crab spider or flower (crab) spider, because it is commonly found hunting in goldenrod sprays in the autumn.