This Wade Barrett fan art contains
spurge, winter jasmine, jasminum nudiflorum, buttercup, butterflower, butter flower, crowfoot, goldcup, and kingcup.
There might also be
western buttercup, ranunculus occidentalis, st peter's wort, hypericum tetrapterum, hypericum maculatum, great st john's wort, hypericum ascyron, and hypericum pyramidatum.