Keynsham Humpy Tumps is a floristically rich acidic grassland site situated between the town of Keynsham

Keynsham

Keynsham is a town and civil parish between Bristol and Bath in Somerset, south-west England. It has a population of 15,533.It was listed in the Domesday Book as Cainesham, which is believed to mean the home of Saint Keyne....

, and the River Avon

River Avon, Bristol

The River Avon is an English river in the south west of the country. To distinguish it from a number of other River Avons in Britain, this river is often also known as the Lower Avon or Bristol Avon...

, southeast of Bristol

Bristol

Bristol is a city, unitary authority area and ceremonial county in South West England, with an estimated population of 433,100 for the unitary authority in 2009, and a surrounding Larger Urban Zone with an estimated 1,070,000 residents in 2007...

, England

England

England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

.

The site is on a south-facing slope running alongside the Bristol

Bristol

Bristol is a city, unitary authority area and ceremonial county in South West England, with an estimated population of 433,100 for the unitary authority in 2009, and a surrounding Larger Urban Zone with an estimated 1,070,000 residents in 2007...

 to Bath railway line. It consists of open patches of grassland and bare rock, interspersed with blocks of scrub.

It is the only site in Avon

Avon (county)

Avon was, from 1974 to 1996, a non-metropolitan and ceremonial county in the west of England.The county was named after the River Avon, which runs through the area. It was formed from parts of the historic counties of Gloucestershire and Somerset, together with the City of Bristol...

 at which Upright Chickweed

Upright chickweed

The Erect Chickweed , also called Upright Chickweed , is a small annual plant in the family Caryophyllaceae. It can grow to over 10 cm in height, but it is usually smaller. It has blue-green glaucous leaves, and small, delicate white flowers...

 Moenchia erecta, occurs. Other locally notable plant species found here include Annual Knawel, Sand Spurrey, Subterranean Clover

Subterranean clover

Trifolium subterraneum, the Subterranean clover often shortened to sub clover, is a species of clover native to northwestern Europe, from Ireland east to Belgium...

 Trifolium subterraneus and Prickly Sedge Carex muricata ssp. lamprocarpa.

The site does not have any statutory conservation status, and is not currently managed for its biodiversity interest. Current threats to its ecological value include the encroachment of scrub onto the grassland

Grassland

Grasslands are areas where the vegetation is dominated by grasses and other herbaceous plants . However, sedge and rush families can also be found. Grasslands occur naturally on all continents except Antarctica...

 areas, and damage from motorcycle scrambling.