A heat resistant tree with stone bark and leaves, that only lives in volcanic areas.
Part of my series on pseudo-magical world building
Prized for the metallic sheen of the foliage, this peculiar plant dwells on the banks of mountain rivers, relying on heavy metals and photoelectric power to spread itself
An influential fungus among us!
Perhaps those that practice elemental magic begin to take on characteristics associated with their chosen element. For instance, an earth elementalist might be prone to agoraphobia, while air and possibly fire elementalists might have problems with claustrophobia. Water elementalists might always seek the path of least resistance. A fire elementalist might have a cat's opinion of water. This could also apply to physical differences. Fire elementalists might have a freakishly high metabolism and a permanently high body temperature. Water elementalists would probably never get dehydrated, but might slow down a lot when it's cold. Etc, etc.