Iresine heterophylla, or Standley's bloodleaf, is a plant species native to the southwestern United States and also to Mexico. It has been collected from Arizona, New Mexico, Texas, Chihuahua, Sonora, Durango, Coahuila, Nuevo León, Campeche and Tabasco.Flora of North America v 4 p 456CONABIO. 2009. Catálogo taxonómico de especies de México. 1. In Capital Nat. México. CONABIO, Mexico City.Martínez Salas, E. M., M. Sousa Sánchez & C. H. Ramos Álvarez. 2001. Región de Calakmul, Campeche. Listados Florísticos de México 22: 1–55.Pérez J., L. A., M. Sousa Sánchez, A. M. Hanan-Alipi, F. Chiang Cabrera & P. Tenorio L. 2005. Vegetación terrestre. 65–110. In J. Bueno, F Álvarez & S. Santiago. Biodiversidad de Tabasco. CONABIO-UNAM, México.
Iresine heterophylla is a perennial herb up to 100 cm tall. Leaves are opposite, ovate, up to 6 cm long. Flowers are arranged in a rather large, branching panicle up to 40 cm long. Flowers are small, white to straw-colored, up to 4 cm across, covered in dense woolly hairs. Fruits are green, egg-shaped, usually less than 1 mm across, enclosed inside the persistent flower parts which are in turn enclosed in woolly hairs, so that the infructescence as a whole appears white and woolly.Standley, Paul Carpenter. 1916. Contributions from the United States National Herbarium 18(3): 95. Henrickson, J. and S. D. Sundberg. 1986. On the submersion of Dicraurus into Iresine (Amaranthaceae). Aliso 11: 355-364.photo of herbarium specimen at Missouri Botanical GardenCorrell, D. S. & M. C. Johnston. 1970. Manual of the Vascular Plants of Texas i–xv, 1–1881. The University of Texas at Dallas, Richardson.Shreve, F. & I. L. Wiggins. 1964. Vegetation and Flora of the Sonoran Desert 2 vols. Stanford University Press, Stanford.
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