Herniaria glabra, known as smooth rupturewort, is a plant of the family Caryophyllaceae.

Smooth Rupturewort is found in eight other localities in Britain, all in East Anglia.

Ellenborough Park supports two Red Data Book plants, Branched Horsetail Equisetum ramosissimum and Smooth Rupturewort Herniaria glabra.

Ellenborough Park supports two Red Data Book plants, Branched Horsetail Equisetum ramosissimum and Smooth Rupturewort Herniaria glabra.