As per Culpeper's Color Herbal, mushrooms are said to be ruled by the planet Mercury (maybe due to their easily proliferating qualities) in Aries (perhaps due to their wildness).
Here's also a table from
http://www.skyscript.co.uk/decumbiture3.html:
Herbs and plants attributed to the planets
Barley, beetroot, comfrey, hemlock, nightshade, spinach, elm tree, yew, pine.
Asparagus, borage, chervil, cloves, nutmeg, chestnut, lime, maple, oak, sage.
Chives, garlic, ginger, hops, mustard, nettles, onion, pepper, radish, rhubarb, tobacco, thistles.
Angelica, bay, cedar, chamomile, cinnamon, marigold, rosemary, sunflower, walnuts, citrus trees, ash, juniper.
Alder, birch, burdock, catmint, cowslip, elder, feverfew, foxglove, mallow, mint, sorrel, strawberries, thyme.
Aniseed, carrot, dill, fennel, lavender, marjoram, parsley, parsnip, valerian, mulberry tree,
mushrooms.
Cabbage, cucumber, lettuce, lily, melons, poppies, pumpkin, saxifrage, wallflower, willow.
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