The segade plant is a type of flora from the Aiel Waste.
The segade plant is a fat leafless plant with a leathery skin, spines and white blossoms.
According to the Aiel, a woman who makes a bridal wreath with segade blossoms indicates that she has a prickly nature and means to keep it. Rand al'Thor sent segade flowers to Aviendha, unaware of their significance.
Judging by the description of the plant, a segade seems to be a cactus.
-"Surprising what you can dig out of books if you read long enough, isn't it?" - Rand al'Thor