1. Seeds of species and distinct color groups of Helleborus x hybridus . 2. Helleborus x hybridus ( also sold as Helleborus orientalis ), Lenten rose. 3. A tall herb fringe hosts common butterbur ( " Petasites hybridus " ). 4. The larvae feed on " Petasites hybridus " from within the stem and later the roots. 5. But Georgia gardeners get the best results with H . x hybridus , better known as the Lenten rose. 6. Among his lesser-known horticultural subjects was cineraria ( Pericallis x hybridus , formerly known as Senecio x hybridus ). 7. Among his lesser-known horticultural subjects was cineraria ( Pericallis x hybridus, formerly known as Senecio x hybridus ). 8. The larvae feed on the stems and roots of various grasses and low plants, including " Petasites hybridus ". 9. Regular glads have such an intricate pedigree that they are not assigned to a species, although catalogs occasionally refer to them as G . hybridus . 10. The exact origin is unknown, as " A . caudatus " is believed to be a wild " Amaranthus hybridus " aggregate.