Agave, Tuberose 'Chocolate Chips'

I bought this plant @ the Ruth Bancroft garden, Walnut Creek, Ca. A couple years ago. Does fine as a potted plant, but I kept it in the ...Read Moregreenhouse during the winter just in case the soil & roots froze, even though the tops die back to the ground in winter. It is blooming now, 6/19/2017. The flower stalk is about four feet tall, the flower petals are blackish, the long whisker like anthers also black, pistil black, and it emits a chemical, unpleasant musty smell
(Bat pollinated ??). No pups on it yet, but hopefully after bloom it will pup. The blooming rosette will probably die afterwards like an agave.
I am crossing it with agave univittata, hopefully to get some
" X mangaves".