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Cotyledon orbiculata, commonly known as pig's ear or round-leafed navel-wort, is a South African succulent plant belonging to the genus Cotyledon.
Cotyledon orbiculata is an extremely variable species, one that grows to approximately 1.3 m (4.3 ft) in height. It has gray-green leaves (up to 13 by 7 cm (5.1 by 2.8 in)), which naturally develop a white, powdery substance (known as farina) on their surfaces; this farina helps reflect sunlight and conserve water. If a specific leaf area is brushed against (or even gently disturbed), the farina will noticeably become smudged. While this powder does not regenerate when disturbed or wiped off, this is normally not detrimental and very rarely unsightly. The majority of succulent plants will, ultimately, lose and replace their older leaves with time. Ironically, water (as dew, marine layer/fog, mist, rain, or even garden hose or hand-watering), does not seem to wash the farina off, and it reappears again as the leaves are drying. The shape of the leaves was thought to have a resemblance to a pig's ear, thus the common name.
