Not a direct answer to your question but----
From: Something To Sing About! - The Personal Choices of America's Folk Singers
Collected and arranged by Milton Okun
The Macmillan Company, Collier-Macmillan Ltd.,London 1968, p.20
":Wildwood Flower", "Can the Circle Be Unbroken,::Worried Man Blues," "Keep on the Sunny Side" are but a few of the wongs associated with the Carter Family, who may well be America's first family of folk song…..Among their chief innovations was the addition of autoharp and guitar to traditinal ballds that had alwys been unaccompanied. The famous and distinctive guitar plaing of Mother Maybelle was another innovation, a variatin of the "church lick" that came to be called "Carter Family style."….Whatever the gulf that stands between the folk-festival world of Newport and the country music world of Nashvill is bridged by the work of Mother Maybelle.
For the collection within this anthology of musician's personal favorites, the Carters selected: Mollie Darling, Johnny I Hardly Knew You, Come All Ye Fair and Tender Ladies, and my own personal favorite, Wildwood Flower.