Prunella vulgaris 
The scientific name for the weed Self-heal.
Ragwort
An uncommon perennial weed of longer turf surfaces or neglected lawns. In mown turf it should not be able to flower, but basal lobed edged leaves will be present. It is commonly associated with pastures and grazing for horses and is classed as an ‘injurious weed' (being harmful to grazing animals which eat it) in the Weeds Act 1959. It grows on a range of dry to moist soil types, being more prevalent in drier conditions. It will grow in a range of soil pH conditions, as well as light shade to open situations. Where it does flower these will be yellow petals, attached to a central yello
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Ranunculus acris
The scientific name for the weed Meadow Buttercup.
Red Clover
A common perennial weed of lesser maintained and neglected turf surfaces. It has trifoliate elliptical type leaves (typically 10mm-30mm in length and 10-13mm in width), with a white chevron marking on. It has a stem with hairs and a prominent tap root. It will grow on a wide range of soils, especially moist to dry ones, but not very acid soils, and prefers open non-shaded conditions. It flowers from May to September, having dark pink flowers with white streaks. Its scientific name is Trifolium pratense.
Ribwort
Another common name for the weed Narrow Leaved Plantain.
Rumex acetosa
The scientific name for the weed Common Sorrel.
Rumex acetosella
The scientific name for the weed Sheep's Sorrel.
Rumex obtusifolius
The scientific name for the weed Broad-Leaved Dock.
Sagina apetala
The scientific name for the weed Annual Pearlwort.
Sagina procumbens