Brugmansias, which hang down, are known as Angel's Trumpets. Daturas, whose buds and fresh blooms point upward are called Devil's Trumpets. The Fragrance of the blooms are quite heavenly. If you've smelled Four O'clocks, the fragrance is similar but Daturas are a more delicate scent and can be caught on the slightest breeze. The scent is best at night, when it attracts Hawkmoths.
Easily grown from seed, they can be treated as annuals, started indoors and planted out after frost. The yellow pictured returned from the roots, the only yellow this year. All the purple are new this year. The leaves have an acrid smell and all parts are poisonous, except to the insects who enjoy them.
Hawkmoth nectaring on Lantana