Bostryx

Bostryx, a form of inflorescence, sometimes called a helicoid cyme, in which there is a sympodium or pseudaxis of successive flower-bearing branches so arranged in succession towards one side, either right or left, of the preceding one as to form a spiral. It occurs in the day-lily (Hemerocallis), and in the secondary branching of the common St. John's-wort (Hypericum perforatum).