moonflower

Short definition from Wiktionary

Noun

1. 1
   Any of several plants that flower at night: An ox-eye daisy (Leucanthemum vulgare)
2. 2
   Any of several plants that flower at night: A corn marigold, Glebionis segetum.
3. 3
   Any of several plants that flower at night: Any of several vines of the genus Ipomoea, especially Ipomoea alba.
4. 4
   Any of several plants that flower at night: Any of species in genus Cereus and in (Stenocereus (syn. Hylocereus) spp.).
5. 5
   Any of several plants that flower at night: Any of species of Datura, including Datura inoxia.
6. 6
   Any of several plants that flower at night: Any of species of Mentzelia, including Mentzelia pumila.