Plumeria (/pluːˈmɛriə/) is a genus of flowering plants in the dogbane family, Apocynaceae.

Scientific name: Plumeria
Higher classification: Apocynaceae
Order: Gentianales
Rank: Genus
Kingdom: Plantae

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Plumeria flowers are most fragrant at night in order to lure sphinx moths to pollinate them. The flowers yield no nectar, however, and simply dupe their pollinators. The moths inadvertently pollinate them by transferring pollen from flower to flower in their fruitless search for nectar.

Source: wikipedia