Does anyone know if you are going to transplant a root how long you have before you have to get it back in the ground?
If the roots are kept in cool moist soil and from drying out, I'd say weeks maybe months but unprotected get them in the ground as soon as possible. TNhunter and Billy could give you more precise details.
Good advice Rootman,
We kept some last year in a plastic Kroger bag packed in forest soil with a layer of leaf litter on top. We had ran out of time that day when transplanting. My buddy waited 2 months to transplant (Which I was hoping would have only been a few days) as he was busy. I told him to leave the bag open so they wouldn't rot and to store them in the basement. He added 1/4 cup of water every 7 to 10 days. He was careful not to over do it on the water. He eventually transplanted them last Nov. The growth buds actual got 10% bigger while in the bag and they came up fine this spring.