Question

The plant which opens during nights and closes in the daytime is
A. Night queen
B. Touch-me-not
C. Vallisneria
D. Jasmine

Answer 1

Hint: It is an evergreen woody shrub growing to 4 meters (13 ft) tall and is named after its behavioral feature of opening at nights.

Complete answer:
Epiphyllum oxypetalum is the scientific name of the Night queen plant.
It essentially belongs to a rare genus of cactus. It is considered to be rare because of the fact the flowers of this cactus blooms only for one night in a whole year.
A fully bloomed Night Queen flower is typical in appearance.
These are white flowers and have a characteristic mild fragrance like that of magnolia or gardenia. The plant requires bright light (filtered light if kept indoors and partial shade in case it is kept outside) for optimum growth.

Therefore, the correct answer is option A. Night queen.

Note: These flowers are quite strange as after blooming they start wilting which is almost completed before the arrival of dawn.