"fallen leaf" is a correct and usable phrase in written English.
It is often used to describe a leaf that has fallen from a tree or plant. Here is an example sentence: The path was covered in fallen leaves, creating a colorful carpet under our feet.
Kerry Godliman What did the snowflake say to the fallen leaf?
Fall: One October day in 1986, I slipped on a freshly fallen leaf and hit my head.
The golfers' diligence in enforcing rules more arcane than the typical N.F.L. infraction was driven home during the first round of the BMW Championship when McDowell turned a 66 into a 68 after owning up to having brushed a fallen leaf while addressing his ball in a bunker on the ninth hole at Crooked Stick Golf Club.
Or for not having heard of the Chinese artist Ju Hu, who created a large-scale work examining the "malleable flow of time" as he camped out in an autumnal forest and tried to tape every fallen leaf back onto its tree.
Sitting in the shade of a tree in Central Park with two close friends, I absentmindedly pick up a fallen leaf and begin crumpling it in my hands.
The fungus grows in woodland and in grassland on moist soil, and is presumed to be saprobic, rotting fallen leaf litter and dead grass stems.
At the end of the day I add those organic ingredients to the compost bin, throw in some grass clippings or fallen leafs (depending on season), give it a mix, and let nature take over.
The plain radiograph aspects of a lesion concentrically located in the medullary cavity of the metaphysis of a long bone with expansion in all directions [ 15] is virtually diagnostic of UBC and may be facilitated by the so-called fallen leaf-sign, representing a fragment of cortex in the cyst cavity, if present [ 16, 17].
Their demands are cliched and absurd – "Falling leaf, falling leaf!
(He has had players who could hit a falling leaf).
It was a smile like a falling leaf, desolate, lifeless.
