There are three roots named for John the Conqueror. Each is in a separate botanical family and has a different method of use. HIGH JOHN THE CONQUEROR ROOT. High John the Conqueror is the most prized of the three John roots.
The first single released from the album, 4 Seasons of Loneliness, was released in August 1997. The song was Boyz II Men's highest debut on the Billboard Hot 100 Singles. It debuted at #2, behind Mariah Carey's Honey.
Here's the album cover An Evening with the Allman Brothers: First Set. It was recorded at the Orpheum Theater in Boston during 1991 and 1992 and released in 1992. (The second set was released in 1995). Using Bing's Birds Eye View I found the alley in front of the theater where the picture was taken. It's called Hamilton Place.