I've been looking for this for fifty-four years. I saw this when it aired ni 1968 on The Smothers Brother's Comedy Hour. I thought it was stunning then and have remembered it all these years - and it is exactly as I remembered. The long version of this is on the Mason Williams Phonograph Album, the album which gave the world Classical Gas and which is one of the great albums of that era. I was obsessed with the tune and orchestration of this song, called Sunflower. When I saw Sweet Charity a little more than a year later I was shocked to hear the end cue, where Charity is sitting on the park bench and the hippies (including Bud Cort) come and give her a flower and hope. The cue was, of course, by Cy Coleman, but either Fosse had temp tracked the ending with Sunflower or Coleman had heard it, because in feel it's exactly the same and mostly it's the same musically, at times exactly so.
Here's the Smothers Brothers clip:
https://youtu.be/STCe11lK-mkAnd here's the full version of Sunflower:
https://youtu.be/SZ5C9PU6vKEAnd here's the Sweet Charity ending:
https://youtu.be/S5AK2y3Z2No