A while ago I received a pack of seeds described as Pycnanthemum Pilosum / Mountain mint. The seeds are small (below 1 millimeter) and brown:
Plants grown out of these seeds are around 40 centimeters high and spread widely. Leaves are bright green and smooth, around 3 - 4 centimeters long:
with strong minty smell (though quite distinct from let's say Mentha × rotundifolia or Mentha spicata).
Recently plants started to flower:
producing clusters (around 1.5 cm in diameter) of small (3 - 4mm long), slightly flowers along the stem. Flowers are white, with light shade of purple. with no spots or other marks.
The plant started to flower in the first year after sowing (the plant is around 4 months old, planted outside, in Central Europe).
I wonder if someone can help me identify it. Thanks in advance.