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Anyone who has ever experienced a severe cold knows just how important a sense of smell is for our everyday lives. Without it, we might not be able to tell onion from chocolate. We would be “blind” to the danger of a gas leak or a pot burning on a cooker. We would be devoid of all the olfactory experience emanating from the plants in our parks and gardens, meadows, and forests.   Read on to find out which ten plants are especially admired for their beautiful aroma! 10.  Philadelphus coronarius  (Sweet mock-orange) Philadelphus coronarius (Sweet mock-orange) This popular ornamental shrub is praised for its decorative white flowers and strong, but pleasant fragrance. This species has been used as a parent of some of the hybrids, such as  Philadelphus × lemoinei.  It is a hardy, tolerant plant, happily growing in the sun and in partial shade.  The numerous hybrids and varieties available offer a wide choice of sizes and types of flowers. 9....