Question: What do Eranthemum and Enkianthus have in common?
Sentence (from "Eranthemum"): Eranthemum pulchellum ("Eranthemum nervosum", English: blue eranthemum, or blue sage) is a strongly branched shrub, popular with gardeners in tropical India and China because of the spikes of flowers that are bright gentian blue - an unusual color in the tropics.
Relevant evidence: Yes