Green flowers

So the only way to get green dye in Minecraft is from cactus but why not add green flowers to Minecraft because I have travel to a desert just to get cactus and i have to go back base just to reise I don't have a any more cactus and i have to go back to the desert and get more cactus so why not add green flowers to Minecraft the first is called green dianthus and the green dye and for the second one is called envy zinnia and you can get lime dye from it.