You didnt know what it was and didnt ask???

Learning hilchos borer in Shulchan Aruch.
Halacha mentions a plant called Tormasin and a uniqueness of it which causes that taking the bean from the pod to be considered Borer.
Now I have no idea what Tormasin are so I asked a yungerman if he knows what it is.
He said "I dont know. I never came across it."
WHAT????
How can you learn this halacha, not understand what its speaking about, and not ask anyone??
For all you know maybe you have been doing the melocho deoraisa of Borer all the time!!!!

It seems to be some species of plant called Lupines.
Be ware.