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very nice one YT, even how he calls! But i understand you're questions, its very difficult for determination.
It is good danfordiae. C. minutus has white stigma. Blue and white danfordiae often are growing together, so no wonder for white seedling.
RI form has straight and well drawn brown stripes, the bud is well tubular which is typical.other korolwokii can have spotted brown stripes and bud are often conical.
Crocus michelsonii