The corkscrew flower is producing clusters of flower in the western Glasshouse Corridor.
The milkweed family Apocynaceae is a mainly tropical family comprising approximately 350 genera of trees, shrubs climbers and perennials which produce a milky latex. The genus Strophanthus is a tropical member of the family containing shrubby climbers whose flowers have a long corolla tube and twisted corolla lobes. In S. speciosus it is these which give rise to the common name corkscrew flower. A South African species, S. speciosus grows in temperate forest margins. All parts of this plant are toxic and this species has been used medicinally as a cardiac stimulant, but also as a source of poison for arrows and as a treatment for snake bites.