"The Withered Leaf", known in Welsh as "Y Stwffwl" ("The Doorknocker") is a Welsh air in 3/4 time and G Major.
The tune is the air to several well known Welsh songs. John Parry, writing in the Cambro-Briton, vol. 1 (1819, pp. 174-175) remarks:
I am sorry, that such a sweet air, as this is, should have such an unmusical name [as "The Door Clapper"]. It is called in many parts of Wales "The Withered Leaf". The words in this selection commence thus:
Sure form of frail beauty that bloom'd for a while,
And bade for a season the green forest smile:
Ah! well may'st thou shrink from the pitiless blast,
And pine for the days that forever are past.
A setting for the song was composed by Franz Joseph Haydn.
It was printed in Kidson & Shaw's Songs of Britain: A Collection of One Hundred English, Welsh, Scottish and Irish National Airs (1913) (appears as "The Withered Leaf") and Williamson's English, Welsh, Scottish and Irish Fiddle Tunes (1976).
It was recorded by Peter Janson on A Long Road: Tunes from Celtic Lands (2013) and Idlewild on Hindeg (2003).
The version given here combines elements of both printed sources and the recording on the Hindeg CD.