Allium ursinum umbel of six to 20 white flowers only, lacking the bulbils produced by some other "Allium" species such as "Allium vineale" (crow garlic) and "Allium oleraceum" (field garlic). It flowers in the British Isles from April to June, starting before deciduous trees leaf in the spring. The flower stem is triangular in cross-section and the leaves are broadly lanceolate similar to those of the lily of the valley ("Convallaria majalis"). It is native to temperate regions of Europe, from Britain east to the Caucasus. It is common in much of the lowland British Isles with the exception of the far
Dactylorhiza majalis subsp. traunsteinerioides taxon was first given a scientific name in 1936 by H. W. Pugsley; he described plants found in Britain and Ireland as "Orchis majalis" subsp. "traunsteinerioides" ("Orchis majalis" being the name used at the time for the species now called "Dactylorhiza majalis"). In 1940, Pugsley raised it from a subspecies to the full species "Orchis traunsteineriodes". The marsh-orchids were later separated as the genus "Dactylorhiza", and in 1947 Pieter Vermeulen first transferred the taxon to "Dactylorhiza traunsteineriodes". This name continues to be used by Clive Stace in the 2010 edition of "New Flora of the British Isles". Other current sources