These risks are only associated with the species Gyromitra esculenta and Gyromitra ambigua. Populations of "Gyromitra esculenta" appear to vary geographically in their toxicity. The edibility of "Gyromitra esculenta" has been recently brought into question. Yet others would be poisoned after eating "Gyromitra esculenta" for many years without ill-effects. See also "Gyromitra esculenta", which is similar in appearance but poisonous. "Gyromitra esculenta" grows on sandy soil in Temperate coniferous forest and occasionally in deciduous woodlands.