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Xanthisma coloradoense (syn. Aster coloradoensis, Machaeranthera coloradoensis) is a species of flowering plant in the family Asteraceae known by the common name Colorado tansyaster. It is native to Colorado and Wyoming in the United States.
This cushion plant is a perennial herb growing from a taproot and branching caudex. It grows up to 14 centimeters tall, with several to many thick, hairy stems. The hairy leaves are lance-shaped to spatula-shaped and the edges are lined with large, sharp teeth tipped with bristles. The inflorescence is a solitary flower head with narrow, white-tipped phyllaries. It contains pink or purple ray florets up to 1.5 centimeters long and many disc florets. The fruit may be nearly a centimeter long including its pappus.
Slender goldenweed · Rush Bristleweed · Xanthisma paradoxa · Spiny Goldenweed · Texas sleepydaisy · Sleepydaisy
Text excerpted from the Wikipedia article Xanthisma coloradoense by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
