A desert shrub or low plant with dark-colored branches and foliage, often found in arid regions.
Compound of 'black' and 'bush' (origin uncertain, possibly from Old Norse). Used to describe dark shrubby vegetation in dry climates.
Dark-colored plants in deserts aren't common because black absorbs heat, yet some species have dark pigments that actually protect them from intense UV radiation in high-altitude deserts.
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