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An update on this. Bob Wallis identified the Evia plant as Fritillaria ehrhartii (in its type locality!)
Nice to see these in their natural range Steve.Having never seen either of these Frits in the wild I am not in a position to advise.I grow F.obliqua and its ssp.tuntasia as well as ehrhartii. I find ehrhartii to be a dwarf species with almost succulent, rather glaucous and often propeller-like leaves. Obliqua with me is a taller, more robust plant with thinner leaves. Both have similar flowers but the tips of the tepals of ehrhartii have more prominent yellow markings.Below are some images of my ehrhartii and obliqua.