British NVC community OV19 (''Poa annua'' - ''Matricaria perforata'' community) is one of the
open habitat communities
A community is a Level of analysis, social unit (a group of living things) with commonality such as place (geography), place, Norm (social), norms, religion, values, Convention (norm), customs, or Identity (social science), identity. Communiti ...
in the
British National Vegetation Classification
__NOTOC__
The British National Vegetation Classification or NVC is a system of classifying natural habitat types in Great Britain according to the vegetation they contain.
A large scientific meeting of ecologists, botanists, and other related pr ...
system. It is one of six communities characteristic of gateways, tracksides and courtyards.
This community is found throughout the lowlands of Britain wherever there is suitable habitat.
There are five
subcommunities.
Community composition
The following
constant species are found in this community:
* Shepherd's-purse (''
Capsella bursa-pastoris'')
* Scentless mayweed (''
Matricaria perforata
''Tripleurospermum inodorum'', common names scentless false mayweed, scentless mayweed, scentless chamomile, wild chamomile, mayweed, false chamomile, and Baldr's brow, is the type species of Tripleurospermum. This plant is native to Eurasia and ...
'')
* Annual meadow-grass (''
Poa annua'')
There are no
rare species associated with the community.
Distribution
This ephemeral community is widely distributed throughout the lowlands of Britain. Characteristic habitats are on farm tracks, around gateways where trampling is only moderate, and on verges alongside roads, wherever disturbance and spray-wash from vehicles prevents the development of a closed perennial sward.
Subcommunities
There are five
subcommunities:
* the ''Senecio squalidus - Epilobium angustifolium'' subcommunity
* the ''Lolium perenne - Capsella bursa-pastoris'' subcommunity
* the ''Atriplex prostrata - Chenopodium album'' subcommunity
* the ''Chamomilla suavolens - Plantago major'' subcommunity
* the ''Elymus repens'' subcommunity
References
*
{{NVC-OV
OV19