Palafoxia riograndensis explained

Palafoxia riograndensis, the Rio Grande palafox or Rio Grande Spanish needles, is a plant species native to Texas, Chihuahua and Coahuila. It is named for the Rio Grande which separates Texas from Mexico. The plant grows in sandy and silty soils at elevations of 50-.^[1]

Palafoxia riograndensis is an annual herb up to 60cm (20inches) tall. Flowering heads have no ray flowers but 8-25 pink, purple or white disc flowers.^{[2] [3] [4]}

Notes and References

1. http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250067281 Flora of North America v 21 p 390.
2. Turner, B. L. and M. I. Morris. 1976. Systematics of Palafoxia (Asteraceae: Helenieae). Rhodora 78: 567–628.
3. https://www.biodiversitylibrary.org/page/616441#page/121/mode/1up Cory, Victor Louis. 1946. Genus Palafoxia in Texas. Rhodora 48(568): 84–86.
4. Correll, D. S. & M. C. Johnston. 1970. Manual of the Vascular Plants of Texas i–xv, 1–1881. The University of Texas at Dallas, Richardson.