  We present high resolution images of the young rapidly rotating K3 dwarf
Speedy Mic (BO Mic, HD 197890). The photospheric spot maps reveal a heavily and
uniformly spotted surface from equatorial to high latitude regions. Contrary to
many images of similar objects, Speedy Mic does not possess a uniform filling
at high latitudes, but exhibits structure in the polar regions showing greatest
concentration in a particular longitude range.
  The asymmetric rotation profile of Speedy Mic indicates the presence of a
companion or nearby star which shows radial velocity shifts over a timescale of
several years. Using a simple dynamical argument, we show that Speedy Mic is
unlikely to be a binary system, and conclude that the feature must be the
result of a chance alignment with a background binary.
  Complete phase coverage on two consecutive nights in addition to 60 per cent
phase coverage after a three night gap has enabled us to track the evolution of
spots with time. By incorporating a solar-like differential rotation model into
the image reconstruction process, we find that the equator laps the polar
regions once every $191 \pm 17$ d. This finding is in close agreement with
measurements for other late-type rapid rotators.
