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Published online by Cambridge University Press: 01 September 2010
Synonymy
Tripleurospermum inodorum stands Kay 1994 p.p.
Constant species
Matricaria perforata, Polygonum aviculare, Stellaria media.
Physiognomy
The Matricaria perforata-Stellaria media community comprises annual vegetation dominated by mixtures of Stellaria media, Polygonum aviculare and Matricaria perforata. Also quite frequent overall but variously represented in the different sub-communities are Poa annua, Elymus repens, Bilderdykia convolvulus and Sonchus asper. Occasionals of the community include Cirsium arvense, Atriplex patula, Raphanus raphanistrum and Urtica dioica. Acrocapous mosses are sometimes conspicuous on bare ground, Bryum rubens, Barbula unguiculata and Dicranella staphylina being recorded most commonly.
Sub-communities
Anagallis arvensis-Viola arvensis sub-community. The vegetation here tends to be quite species-poor but enlivened by the pretty flowers of Viola arvensis and Anagallis arvensis.
Poa annua-Galeopsis tetrahit sub-community. P. annua shows its peak of frequency here with Galeopsis tetrahit, Cerastium fontanum and Elymus repens also frequent, Aphanes arvensis and Juncus bufonius occasional.
Elymus repens-Potentilla anserina sub-community. E. repens and Poa annua both remain frequent in this subcommunity but Agrostis stolonifera also becomes common, along with Potentilla anserina and Equisetum arvense. Also more frequent, though showing their peak of occurrence in the next sub-community, are Bilderdykia convolvolus, Chenopodium album, Capsella bursapastoris, Chamomilla suaveolens, Trifolium repens and Veronica persica. Lamium purpureum, Bromus sterilis, Tussilago farfara and Ranunculus arvensis are more distinctive occasionals.
Bilderdykia convolvulus-Veronica persica sub-community: Lycopsietum arvensis (Raabe 1944) Passarge 1964 sensu Silverside 1977; Alchemillo-Matricarietum chamomillae R.Tx. 1937 emend. Passarge 1957 sensu Silverside 1977.
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