Some Thesaurus words for intense - acute, agonizing, ardent, burning, concentrated, consuming, deep, diligent, earnest, energetic, exaggerated, excessive, extreme, fanatical, fierce, forcible, great, marked, piercing, powerful, sharp, shrill, strong, supreme, violent, vivid, zealous.
For me, the only words to describe this spider mum is piercingly vivid. The main reason is because of its wonderfully dramatic lime green color - who knew this hue could be found naturally? Nature offers many colorful feasts for our eyes, you just have to be willing to see them. Awareness is the first step. Look around and take pleasure in your surroundings, you might be pleasantly surprised by your findings!