https://www.merriam-webster.com/dictionary/cushion%20plant
CUSHION PLANT Definition & Meaning - Merriam-Webster
The meaning of CUSHION PLANT is a plant that grows in a dense cushiony tuft (as many xerophilous and alpine plants) thereby preventing excessive transpiration.
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https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2015.00304/full
Frontiers | Bacterial community of cushion plant Thylacospermum ceaspitosum on elevational gradient...
Although bacterial assemblages are important components of soils in arid ecosystems, the knowledge about composition, life-strategies and environmental drive...
cushion plantfrontiersbacterialcommunity