First published in 1991, with the support of the Nature Conservancy Council and the World Wide Fund for Nature, this continues to be the most accessible source of information for general use.
The earliest important work to address the flora of Colonsay in any detail was "Colonsay - One of the Hebrides" by Murdoch McNeill. This important work was published in 1910, and a facsimile edition by House of Lochar is available on this site. Clarke & Clarke, like McNeill, were resident in Colonsay and in a position to report on the current status of the flora.
This is an extremely attractive booklet; the first twenty pages include information of a general nature - geology, habitat, suggested walks etc. The bulk of the publication - some thirty-five pages - is devoted to a checklist of the flora, with a numeric reference to known habitats e.g.
"* Dryopteris filix-mas Male fern
Damp woods and hedgebanks. Local and uncommon. Under-recorded? 1,6,12,15,17."
In addition to details of some 600 native species, there is a brief list of introduced species together with a useful bibliography and some eight pages of coloured photographs.
SORRY - now out of print