Complex sentence: The synonym "Schizostylis" is widely used in British horticulture for the single rhizomatous species "S. coccinea", widely cultivated as a garden flower, and with numerous cultivars.
Split into simpler sentences: The synonym "Schizostylis" is widely used in British horticulture. It contains a single species "S. coccinea", widely cultivated as a garden flower, and with numerous cultivars.