If it is crab like in its movements it could be a Misumena vatia
they disguise themselves to match the colour of the flower, I have seen both yellow and white ones.
Does it look like this
more info can be viewed from this link:
I found a white spider with a red v shape on its back in my strawberry plant. anyone know what it is?
I think its a Victory V , spider, their bites can be hot.
Reply:I would guess it's a leave-me-the-hell-alone kind of spider--no harm done, just leave him be and let him do his job--eating the bugs that would pester your strawberry plants.
Reply:Enoplognatha ovata. There is a better picture at the second link. Quite a common spider in the UK.
Reply:It is a type of crab spider.
They live in flowers and do not make webs.
When a fly or bug goes in the flower they catch it and eat it.
Goldenrod spiders are white and yellow and have a V pattern on their abdomen