# Commission Regulation (EC) No 1737/2006 of 7 November 2006 laying down detailed rules for the implementation of Regulation (EC) No 2152/2003 of the European Parliament and of the Council concerning monitoring of forests and environmental interactions in the Community, Division (67): Layers

Extent: E+W+S+N.I.

The following layers are defined.
1 tree layer (only ligneous, incl. climbers) > 5 m height
2 shrub layer (only ligneous, incl. climbers) > 0,5 m height
3 herb layer (all non-ligneous, and ligneous < 0,5m height)
4 moss layer (i.e. terricolous bryophytes and lichens).
Seedlings and browsed trees below 0,5 m should be part of the herb layer.

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Source: https://www.legislation.gov.uk/eur/2006/1737/annex/I/chapter/15/division/10/division/67 (the official version)
Page: https://openlegislation.uk/eu-regulation-2006-1737/annex-I/chapter-15/division-10/division-67
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.