Bugle
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Ajuga reptans
Common & widespread in Britain.
The leaf blades are hairless and are usually elliptical or ovate with a rounded tip and shallowly rounded teeth on the margin.
The inflorescence forms a dense raceme composed of whorls of blue flowers, each with dark veins on the lower lip.
The calyx has five toothed lobes and the corolla forms a two-lipped flower about 14 to 17 mm (0.6 to 0.7 in) long with a short tube.
The upper lip of each flower is short and flat with a smooth edge, and the lower lip is three-lobed, the central lobe being the largest, flat with a notched tip.
There are two long stamens and two short stamens, which are longer than the corolla and are attached to the tube.
Flowers from April-July.