Provides an up-to-date account of 138 of Shetland's rarest plants. Their distribution in Shetland is mapped, and current population status described, including details of the threats facing those which are most vulnerable. This is an essential reference for anyone with an interest in Shetland's flora and its conservation. It is intended as an update to Scott & Palmer's 1987 Flowering Plants and Ferns of the Shetland Islands, which remains the key text on Shetland's native flora.