It may take three years to flower, but it will cover trellises or (in our case) unattractive sheds on one's property in no time. In fact, it may be holding our shed up at this point. A woody vine, the flowers are a flashy red-orange, two to four inches long, and highly attractive to hummingbirds. Host plant for the Sphinx moth. Root is diaphoretic and vulnerary. Sap may cause dermatitis in sensitive individuals. Difficult to eradicate once established because of its deep taproot.