dilatum vs asperatum

[Danielle]

Greetings all,

Asiatica has A. asperatum listed under the on-line specials.  I believe they
mention a comparison/connection to dilatum.

Ordered dilatum 2001 #15 from Chen Yi and received one that looks dilatum
and one like the aperatum afore mentioned.

Only difference to the eye appears to be following:
(please excuse the casual description, I'm untrained)

spathe doesn't form complete tube
hood is shorter and more narrow
spadix less stout and shorter.

So is asperatum really a species, or is it a subs. of dilatum?
Anybody else out there note additional differences?

Danielle
Edgewood, Washington
USDA 7b