No, I think humboltii is a phrag. that perhaps Ursula grows. You are probably thinking of Mcp. humboldtii which used to be a Schomburgkia. Mine is the alba form shown here.
Two others I like are the Schomburgkia tompsoniana
and the Schomburgkia brysiana, var. semi alba shown here.
These have all been changed to Myrmecophila [Mcp.] through no fault of their own and many of us are not happy about it. I think Kathy said it best when she pointed out that Schomburgkias were just Cattleys on steroids.
Jim
