But there is also a plant I just found out about here in Europe:
False Flax, Linseed Dodder, German Sesame, Siberian Oilseed
Camelina sativa - Brassicaceae : up to a whopping 45% Omega-3 in the oil.
And even if Hemp is high in EFAs, it doesn't have all the beneficial ones.
Though there is other benefits to Hemp over the Oils besides EFAs.