[JoeProBono]

While “nut” is in their name, peanuts are in fact legumes. Peanuts actually grow underground, as opposed to nuts like walnuts, almonds, etc. that grow on trees (and are sometimes referred to as "tree nuts").

[Bigg Red]

Yes, I learned around 5th grade that peanuts are legumes — Lord only knows what they learn in 5th grade now. But peanuts do not, apparently, fall into the category of pulses, as the definition I found says the legumes referred to as “pulses” grow in pods.