Some of the most fragrant plants at the moment here in my Berkeley, California garden are the Michelia doltsopa, some remnant flowers on the Brugmansia 'Charles Grimaldi', Edgeworthia chrysantha, Pittosporum undulatum and Daphne odora marginata. Several Mexican Salvias such as Salvia iodantha and Salvia elegans 'Golden Delicious' are also in full bloom, but any fragrance is really from the foliage, not the flowers. But of all of them, the Michelia is my favorite.