What is the author trying to communicate about wisteria with simile like a lime-green cloud?

By comparing wisteria to a "lime-green cloud," the author is trying to communicate that the wisteria is a voluminous, billowy mass that resembles a cloud in both its shape and its color. This simile helps to create a vivid and memorable image of the wisteria, allowing the reader to visualize the beauty and grandeur of this natural phenomenon.