References to "Tit-Willow" ("On a tree by a river"): Allan Sherman's parody is described above. In one of his appearances on "The Dick Cavett Show", Groucho Marx and Cavett sang the song. Groucho interrupted at the line "...and if you remain callous and obdurate, I shall perish as he did..." to quiz the audience on the meaning of the word "obdurate". The song is featured in the 2003 TV movie "And Starring Pancho Villa as Himself". An episode of Perry Como's TV show did a parody titled "Golf Widow". A Muppet Show season 1 episode (aired on 22 November 1976) featured Rowlf the Dog and Sam Eagle singing the song, with Sam clearly embarrassed at having to sing the word 'tit' (also asking the meaning of "obdurate"). The song is played during the film "Music for Ladies in Retirement" (1941) In the 1971 film "Whoever Slew Auntie Roo?", Shelley Winters as the title character sings "Tit-Willow" just before she is murdered. In John Wayne's last movie "The Shootist", made in 1976, Wayne and Lauren Bacall sing several lines from "Tit-Willow", before he departs with the intention of dying in a gunfight instead of from cancer.