Xanthisma is a genus of about 10 species in the family Asteraceae, native to United States and Mexico. Most species have bright yellow, daisy-like flowers at the tips of branching stems. These wildflowers bloom mostly in spring, but may flower at other times of the year. They are drought-tolerant and great for xeriscape gardening
The genus name comes from the Greek words "xanthos", which means "yellow", and "ismos", meaning "condition", which refers to bright yellow florets.
Some of the common names for Xanthisma include "Sleepy Daisy" (Xanthisma texanum). "Annual Bristleweed" or Slender Goldenweed (Xanthisma gracile), Colorado tansyaster (Xanthisma coloradoense) and "Rush-like Bristleweed" (Xanthisma junceum).
Xanthisma means endurance.
Interesting facts about Xanthisma:
Xanthisma is drought tolerant and suitable for xeriscaping, a method of gardening or landscaping that minimizes water needs.
The flower petals open up during the day as the sun begins to come up and close in the afternoon. It's a behavior called nyctinasty.