Tropicals & Tender Perennials: need a i.d please, 0 by lizrainey

lizrainey wrote:
back in 1990 we purchased this home and what i thought was some caly lily i dug up and moved to the frount door.
i have never seen such a flower it is the slowest grower to multiply and the flower is the most stunning color of deep plum when we have cut them oh my after a day they have a horrible smell
they are beauties i would love to learn more about them i havent seen them in any nursery or in any gardening books any help would be greatly appreciated, thank you