Mushrooms are not plants but berries are, misidentified berries can be poisonous.
Can your LLM always detect that? You realize that foraging is a huge reason people do this, and bad directions have very real consequences. From a culinary perspective, does it matter? Is it a growing, potential edible (technically not a plant the way tomatoes are technically a fruit) thing on the ground?
FWIW, even ignoring the fungi aspect, you probably have a related issue around small red fruits.