Question: Which has more species, Erythrina or Thalia?
Sentence (from "Erythrina × bidwillii"): Erythrina × bidwillii is the scientific name for two different cultivars produced from hybridising "Erythrina" species at Camden Park Estate, New South Wales, Australia, in the early 1840s by William Macarthur, one of the most active and influential horticulturists in Australia.
Relevant evidence: No