Palafoxia riograndensis

Palafoxia riograndensis
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Eudicots
(unranked):	Asterids
Order:	Asterales
Family:	Asteraceae
Subfamily:	Asteroideae
Genus:	Palafoxia
Species:	P. riograndensis
Binomial name
	Palafoxia riograndensis; Cory

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 50–200 m (160–660 ft).^[1]

Palafoxia riograndensis is an annual herb up to 60 cm (24 in) tall. Flowering heads have no ray flowers but 8-25 pink, purple or white disc flowers.^[2]^[3]^[4]

References

^ Flora of North America v 21 p 390.
^ Turner, B. L. and M. I. Morris. 1976. Systematics of Palafoxia (Asteraceae: Helenieae). Rhodora 78: 567–628.
^ Cory, Victor Louis. 1946. Genus Palafoxia in Texas. Rhodora 48(568): 84–86.
^ 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.

[1] 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] 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.

[1]

[2]

[3]

[4]