Galapagos Species Database

The Galapagos Species Database shares the information about the species from our Natural History Collections.

Dysphania ambrosioides L.

paico, hierba hormiguera, apazote, mexican tea, american wormseed

Photo: .
Photo: .

Taxonomy

Domain
Eukaryota

Kingdom
Plantae

Phylum
Magnoliophyta

Class
Magnoliopsida (= Dicotyledoneae)

Order
Caryophyllales

Family
Amaranthaceae

Genus
Dysphania

Species
ambrosioides

Taxon category: Accepted

Syn.: Ambrina ambrosioides (L.) Spach

Origin: Introduced - established

Introduction

Year of first record: 1926

Mode of introduction: Intentional

Introduction Pathway: Intentional

Subpathway: Agriculture/Horticulture

Introduced status: Naturalized

Invasive status: Potentially Invasive

Distribution

Map of specimen collection localities or observation records for this species in our collections database.

References

  • Castro, S. A. Curtis, C.D., Silva, L., Torres-Santana, C.W., Reyes-Betancort, J.A., Atkinson, R., Jaramillo, P., Guézou, A. & Jaksic, F. M. (2010) Floristic homogenization as a teleconnected trend in oceanic islands. Diversity and Distributions, (Diversity Distrib.): 1-9.
  • Christophersen, E. (1932) A Collection of Plants from the Galápagos Islands. Nyt Mag. Naturvidenskaberne 70: 67-95.
  • Flores, E. (1985) Censo de Plantas Introducidas desde el Canal de Itabaca hasta Puerto Ayora. Tesis de Ingeniero Forestal, Univ. Técnica Luis Vargas Torres, Esmeraldas: 1-132.
  • Guézou, A. Trueman, M., Buddenhagen, E., Chamorro, S., Guerrero, A.M., Pozo, P., Atkinson, R. (2010) An extensive Alien Plan Inventory from the Inhabited Areas of Galapagos Plos One/ www.plosone.org. Volume 5/ Issue 4/e10276
  • Lawesson, J.E. (1987) Plantas exóticas en las Islas Galápagos, un resumen. Memorias. Taller sobre investigación Botánica y manejo en Galápagos. Pg. 17-23.
  • Porter, D.M. (1983) Vascular Plants of the Galapagos: Origins and Dispersal. In: Bowman, R.I., Berson, M. & Leviton, A.E. (eds.): Patterns of evolution in Galápagos organisms. Pacific Division, AAAS, San Francisco, California, p. 33-96.
  • Tropicos.org. (2017) Database of Missouri Botanical Garden. Tropicos.org. Missouri Botanical Garden. 06 Oct 2017 <http://www.tropicos.org
  • Wiggins, I.L. Porter, D.M. (1971) Flora of the Galapagos Islands Standford University Press, Stanford.

You are welcome to download and use the information found in this page, acknowledging its source.

This page should be cited as follows:

"Galapagos Species Database, Dysphania ambrosioides", dataZone. Charles Darwin Foundation, https://datazone.darwinfoundation.org/en/checklist/?species=271. Accessed 31 October 2026.