Wanted: Erythronium tuolumnense

Yellow lily-like grows in shade – saw it in the guardian. This kind only grows to 10cm but there are other types of erythronium which would be taller. Had thought to put them under the fruit trees but crocus says don’t put them under trees which will use up all the moisture because they like dampness.. The paper says buy them as growing plants not just the bulbs because often the bulbs won’t grow.