Astranthium robustum explained

Astranthium robustum, the Texas western-daisy, is a North American species of flowering plants in the family Asteraceae. It is found only in the western (trans-Pecos) part of the US State of Texas.^{[1] [2] [3]}

Astranthium robustum is an annual with a taproot, and usually with several stems up to 50 cm (20 inches) tall. Flower heads have white or bluish ray florets and yellow disc florets.^[4]

Notes and References

1. De Jong, D. C. D. 1965. A systematic study of the genus Astranthium (Compositae, Astereae). Publications of the Museum of Michigan State University, Biological Series 2: 429–528.
2. http://bonap.net/MapGallery/County/Astranthium%20robustum.png Biota of North America Program 2014 county distribution map
3. http://www.guynesom.com/Texendemicsweb.htm William R. Carr, The Nature Conservancy of Texas. 2009. No Place but Texas: An Annotated List of Plant Taxa Endemic to the Lone Star State
4. http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250066174 Flora of North America, Texas western-daisy, Astranthium robustum (Shinners) De Jong, Publ. Mus. Michigan State Univ., Biol. Ser. 2: 521. 1965