We've posted a picture of Jessie and her orchid.

The common names, "Night-Blooming Cereus" and "Queen of the Night", are two different varieties, but daughter Jane says, "from the photos I've seen, Mother's appears to be, specifically, a Hylocereus monocanthus. These plants are known and cultivated for their beautiful and fragrant flowers, which open and close in a single night."

This plant, given to Jessie by her sister, Dimple Yates, begins to bloom between 9 and 9:30 pm, but doesn't open fully until about 11 or 11:30 pm.

Jane suggests a couple of web links which fellow plant lovers might also want to visit: Glenn's Epi (for Epiphyllum) Page, and a site which she says, "has gorgeous close-ups and even a time lapse of the flower opening"