Aller Hill () is an 18.4
hectare
The hectare (; SI symbol: ha) is a non-SI metric unit of area equal to a square with 100-metre sides (1 hm2), that is, square metres (), and is primarily used in the measurement of land. There are 100 hectares in one square kilometre. ...
(45.4 acre)
biological Site of Special Scientific Interest near
Aller in
Somerset
Somerset ( , ), Archaism, archaically Somersetshire ( , , ) is a Ceremonial counties of England, ceremonial county in South West England. It is bordered by the Bristol Channel, Gloucestershire, and Bristol to the north, Wiltshire to the east ...
,
notified in 1988.
The site contains three species of plant which are nationally rare and a further three which are of restricted distribution in Somerset. The central area contains a sward dominated by
sheep's fescue (''Festuca ovina'') in combination with
yellow oat grass (''Trisetum flavescens'') and
quaking-grass (''Briza media'').
Salad burnet (''Sanguisorba minor'') forms a major component of the sward with
rough marsh-mallow (''Althaea hirsuta'') and
nit-grass (''Gastridium ventricosum''), two
nationally rare species, also present.
on the slopes of the hill are also designated as a
biological Site of Special Scientific Interest.
References
{{Authority control
Sites of Special Scientific Interest in Somerset
Hills of Somerset
Sites of Special Scientific Interest notified in 1988
Somerset Levels