This Windows 7 Vista & XP Picks wallpaper contains
buttercup, butterflower, butter flower, crowfoot, goldcup, kingcup, winter jasmine, jasminum nudiflorum, japanese apricot, mei, and prunus mume.
There might also be
st john's wort, butterfly orchid, great st john's wort, hypericum ascyron, and hypericum pyramidatum.