Galapagos Species Database
The Galapagos Species Database shares the information about the species from our Natural History Collections.
Tetramerium nervosum
olotillo, hairy fournwort, tetramerium
Suffrutescent herb to 1 m high, stems pubescent, leaf blades ovate; corolla white or purplish white, 10 mm long (Wiggins and Porter 1971).
In dry or damp situations; thickets and open hillsides, low altituides (Wiggins y Porter 1971).
Domain
Eukaryota
Kingdom
Plantae
Phylum
Magnoliophyta
Class
Magnoliopsida (= Dicotyledoneae)
Order
Lamiales
Family
Acanthaceae
Genus
Tetramerium
Species
nervosum
Taxon category: Accepted
Syn.: Tetramerium hispidum Nees fide Royal Botanic Gardens, Kew & Missouri Botanical Garden (2010)
Origin: Native
Map of specimen collection localities or observation records for this species in our collections database.
Distribution: The native range of this species is Arizona to Texas and Central America, W. South America to N. Venezuela (POWO, 2023).
- Cayot, L. J. (1987) Ecology of Giant Tortoise (Geochelone elephantopus)in the Galápagos Islands. Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Biology in the Graduate School of Syracuse University.
- Heleno, R. Blake, S., Jaramillo, P., Traveset, A., Vargas, P. & Nogales, M. (2011) Frugivory and seed dispersal in the Galápagos: what is the state of the art? Integrative Zoology 6: 110-128.
- Itow, S. (1997) List of Plant Specimens collected in the Galápagos Islands, Ecuador. Bulletin of the Faculty of Liberal Arts, Nagasaki University, Natural Science, 38 (1): 53-144.
- Lawesson, J.E. (s.a.) Pers. obs. field notes, collections 1985-7.
- McMullen, C.K. (1987) Biologia reproductiva de las Angiospermas de las Islas Galapágos. Pg. 39 - 52. Memorias: Taller sobre investigación Botànica y manejo en galapágos.
- Robinson, B.L. (1902) Flora of the Galapagos Islands. Papers from the Hopkins-Stanford Expedition to the Galapgaos Islands. Proc. Amer. Acad. 38(4): 78-270.
- Royal Botanic Gardens, Kew Missouri Botanical Garden (eds.) (2013) The Plant List, Version 1.1. Published on the Internet; http://www.theplantlist.org/ (accessed 1st January).
- Royal Botanic Gardens, Kew (2022) Plants of the world online POWO (2022): Plants of the world online. Published on the Internet; Https://powo.science.kew.org/
- Stewart, A. (1911) A botanical survey of the Galápagos Islands. Proc. Calif. Acad. Sci. 4th Series, 1: 7-288.
- 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, Tetramerium nervosum", dataZone. Charles Darwin Foundation, https://datazone.darwinfoundation.org/en/checklist/?species=130. Accessed 31 October 2026.