NVC community SD19 (Phleum arenarium - Arenaria serpyllifolia dune annual community) is one of the 16 sand-dune communities in the British National Vegetation Classification system.
It is one of six communities associated with foredunes and mobile dunes.
It is a widespread coastal community.
The community has five constant species: Two rare species, Early Sand-grass (Mibora minima) and Dune Fescue (Vulpia membranacea), are associated with this community.
This community is widespread but scarce on British coastlines; it is more common in England and Wales than in Scotland, where it has to date only been found at a single site in the southwest.