Found in open woodland and clearings on base-rich soils in Great Britain, W and Central Europe.
This helleborine is very similar to Epipactis helleborine but is autogamous (self-fertilised), and in some individuals the flowers are cleistogamous (do not open). There are several other closely-related autogamous species of helleborine such as E. leptochila, E. dunensis, E. cleistogama, and the best system of classification of this group is a matter of debate. The flowers of E. muelleri are small and greenish in colour.
Photographs: Germany, 2000.
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