The flora of the Outer Hebrides had been described by a succession of botanists since the 18th century, however a comprehensive account of the flowering plants and ferns was not published until 1991 (Pankhurst and Mullin). As a result of extensive survey work since 2002 the distribution of the flowering plants and ferns is now comparatively well documented.
Archaeological studies and pollen analysis indicate that the composition of the flora has changed dramatically through the combination of climate change and man's activities, culminating in an almost treeless landscape. Apart from recent planting, native trees are restricted to islands in lochs, steep-sided gorges and cliffs.
The diversity of the flowering plants of the upland areas and blanket bogs is limited in comparison to the biodiversity of the coastal areas, particularly the machair. These coastal grasslands comprises a complex mosaic of habitat types which support between 100-150 species.
In the absence of a website on the flora of the Outer Hebrides this site is the main source of information on-line.
Launched at the end of 2017 this is the the most recent addition to the hub and is still a work in progress. It covers the seaweeds (marine algae and chromists) and freshwater algae, including desmids and diatoms, and cyanobacteria.
© 2017 Chris & Christine Johnson. All rights reserved