Question
Jim,
I drew the Mtdm. Bartley Schwartz 'Highland' in a drawing class.  I'm now searching for the botanical name and can't figure it out.  Can you help?  Thanks!

Answer
Hello Susan,

Mtdm is shorthand for Miltonidium which is a hybrid between Miltonia and Oncidium orchids.  While they are different orchid species, they are related like distant cousins.  

Hope this helped.  

Jim Kawasaki
San Jose, Ca.