Now and then, you meet a plant that genuinely surprises you with its resiliency! Ewartia, or cushion plants, endemic to Tasmania, are compact, low-growing plants that form tightly packed stems. They grow hemispherical, which is characteristic of cushion plant species. It can spread a meter in diameter, creating adventitious roots along its branches! Tasmanian cushion plants evolutionarily converged due to wind activity at high altitudes. High winds blow anything away that grows too tall.

Cushion plants do not form a taxonomic group but describe an excellent example of convergent evolution. Plants growing in harsh environments have evolved similar adaptations of forming compact masses of closely spaced stems. They grow in environments with limited soil formations and low water retention. By developing close to the ground, they minimize wind-based water loss. Because they grow in harsh environments, they have little competition for sunlight and can afford to lose height.

































