by Graham Smithers
In a show, each of six gardeners (Beardshaw, Dimmock, Flowerdew, Greenwood, Klein and Thrower) exhibited two different shrubs, showing twelve shrubs in total (Abutilon, Azalea, Berberis, Cornus, Euonymus, Hibiscus, Holly, Magnolia, Potentilla, Spiraeas, Weigela and Wisteria) among them.
For each gardener and their two shrubs, any two of their three names always shared exactly two letters (ignoring case and noting that letters may occur more than once in a name).
(a) Which two shrubs did Beardshaw exhibit?
(b) Who exhibited the Abutilon?