I bought a cycad of unknown species and am trying to identify it. It appears to be a Cycas, since leaflets have a well pronounced rib, but that's about as far as I can go. The first suspects were Cycas Circinnalis or Cycas Thouarsii, but both of those I believe have flat leaflets (I am talking about individual leaflets being flat, not the whole leaf). The cycad in question has keeled leaflets (see pictures attached). The plant's leaves are about 6 ft long -- surprisingly long for a plant this young.

I would appreciate to hear any ideas.