Which adjective do you think has existed longer in English, evergreen or perennial? If you count the hyphenated form ever-green (which of course means "always green"), then evergreen is older; its earliest known use dates from the 16th century. The hyphen-free form is first seen in writing from the 17th century as an adjective as well as a noun, meaning "conifer." The earliest known use of perennial as an adjective meaning "remaining green all year long" appears in the first half of the 17th century. Evergreen also wins in the more general "long lasting" sense. It began appearing in figurative use circa mid-17th century, whereas perennial began to be used with that "enduring" meaning in the early 18th.