Sagittaria for edible tubers

I'm wanting to grow Sagittaria for the edible tubers, but I was sent the wrong species by the nursery.  I wanted Sagittaria latifolia, but was sent Sagittaria montevidensis.  What I can't find out is if montevidensis makes tubers. 

Does anyone here know?

i was planning to plant soome of these last spring, but it never panned out.

i looked it up wapato in forager's harvest.  he only mentions s. rigida & suneata in addition to latifolia.  he says rigida has small tubers.  the author is from wisconsin so those are probably just the species he has come into contact with.

Euell Gibbons says in Stalking the Wild Asparagus only that all species have edible tubers and that they used to all be classified as s. variabilis.

Thanks!  I guess I'll just wait and see if they make tubers.  They'll have pretty flowers anyway! 

Looks like the Sagittaria was mislabeled.  It's blooming and the flowers are just white without the red spot of the montevidensis, so it looks like it is Sagittaria latifolia after all!  Hooray! 

I'm interested in growing sagitaria latifolia, but haven't been able to locate any tuber sources. Where did you order yours from? Also, is anyone familiar with domesticated varieties. I remember reading somewhere that a domesticated variety is grown in China.

Barefooter, I have a bunch of Sagittaria out back in the creek. If you can wait until it gets a little warmer in the spring, I could probably send a few tubers your way. Where are you at? PM me with your info and maybe we can work out a plant trade

I ordered mine online from https://www.pondmegastore.com/shop/home.php?cat=281

they are also at  http://www.lilypons.com/Arrowhead/productinfo/20160/