As a botany undergrad, I studied mycology. Fungi were thought of as non-green plants in the kingdom Plantae. Now, thanks to modern genetics, we know that fungi are more like very slow animals, in the clade Opisthokonta. A mushroom is closer to your dog than to a tree.
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All the mushrooms around here are much closer to trees than to our dogs.
My undergrad Botany text started with the tiny plants known as blue green algae, before moving on to fungi, seaweeds of various sorts, lichen, and finally vascular plants
Anyone know how many Aus Unis out there now run dedicated mycology units?