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The flower only lasts in bloom about six hours and does not revive- when withered, the ovary enlarges, becomes pulpy and forms an acid juicy fruit, something like a gooseberry.
Cereus has been used as a cardiac stimulant and as a partial substitute for digitalis.
But for one midsummer's night each year, its exquisitely scented flower opens as night falls, then closes forever with the first rays of the morning sun.
The NightBloomingCereus has a tuberous, turnip-like root usually weighing 5 to 15 pounds (but in some specimens weighing over 100 pounds), which Native Americans used as a food source.
These very fragrant trumpet-shaped flowers, which bloom for only one night in June or July, are up to 4 inches wide and as much as 8 inches long.