I recently purchased what had been sold as young Aponogeton crispus at a
local, well-known store. At the store, these bulbs had very short leaves
on them that I assumed at the time were due to the fact that almost all
the substrate of the 10g tank they were kept in was covered in bulbs so I
thought perhaps growth was stunted due to lack of nutrients. I put them in
a bag outside for a couple of weeks to give them a dormancy period (temps
were above freezing at night and never more than 60F during the day) and
then put them in a new tank setup. They've since started sprouting
vigorously, enough for me to tell they are not A. crispus. The giveaways
are that the green leaf growth is extremely short, no more than 2-3 inches
tall. These leaves are much healthier appearing and numerous than the
leaves they had at the shop so I don't think the short height has to do
with nutrient deficiencies. The real indications that they are not pure A.
crispus is that each bulb has multiple rosettes (leaf clusters if you
will) sprouting from it and one bulb has sent up two floating leaves.

So now the question is what do I have. The submerged growth is green and
undulated. The floating leaves are elongated with a more reddish brown
color. The floating leaves are definately oval shaped, not heart shaped as
one might expect of a Nymphae species that sometimes gets mixed in with
Aponogeton bulbs. I was leaning towards perhaps A. natans as that would
explain the floating leaves, but cannot find a good description of their
submerged leaves to know if the multiple rosettes of short undulated green
leaves is consistent. It could of course also be a hybrid I know. It has
not yet sent up a flower stalk to see what that looks like.

Any ideas on what they are?