Having stomata (microscopic pores) that are hidden or sunken into the leaf surface rather than raised, as an adaptation to dry or harsh environments.
From Greek 'kryptos' (hidden) + 'stoma' (mouth/opening), a botanical term describing how plants adapt their pores to conserve water in extreme climates.
Desert plants evolved sunken stomata like tiny bunkers—by sinking their pores below the leaf surface, they create tiny pockets of humid air that prevent water from evaporating, giving them an edge in scorching conditions.
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