thicket-forming

North of this zone is the low Arctic, which is characterized by tundra vegetation in the strict sense (Fig. 7.17), consisting of communities of low, thicket-forming shrubs with sedges, tussock-forming sedges with dwarf shrubs, and mires in poorly drained areas.

Effects of changes in climate and UV radiation levels on structure of arctic ecosystems in the short and long term 2009

The American hazel is a large thicket-forming shrub, which sprouts very freely after cutting, and the foliage is generally dense.

Northern Nut Growers Association Incorporated 39th Annual Report at Norris, Tenn. September 13-15 1948

An attractive thicket-forming evergreen shrub from west coast of North America.

The Guardian World News 2009