This Katherine Pierce fan art contains
spurge, buttercup, butterflower, butter flower, crowfoot, goldcup, kingcup, winter jasmine, and jasminum nudiflorum.
There might also be
grainfield, grain field, bur marigold, burr marigold, beggar ticks, beggar's ticks, sticktight, great st john's wort, hypericum ascyron, and hypericum pyramidatum.