Senna didymobotyra, or popcorn Cassia is a fun addition to any garden because the crushed flowers and buds have a strong scent of buttered popcorn. It is a robust plant that enjoys sun and heat. Note the large bumble bee closing in for a pollen snack. It is also a favorite of caterpillars of the large yellow sulphur butterflies so watch for eaten leaves in late summer. B. Bennett garden