Galapagos Species Database

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

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Najas guadelupensis (Spreng.) Magnus

Common Waternymph, Guadalupe Waternymph

Stems very slender, about 0.5 mm thick or less, 3-6 dm long; leaves narrowly linear, flat or slightly crispate, 0.5-1 mm wide, 1-2.5 cm long, acute to acuminate and with 1-4 short, 1-celled spines at apex, marginal teeth minute, 1-celled, brownish, 10-18 along each side (Wiggins and Porter, 1971).

Widely distributed in fresh-water pools, ditches, and sluggish streams (Wiggins and Porter, 1971).

Taxonomy

Domain
Eukaryota

Kingdom
Plantae

Phylum
Magnoliophyta

Class
Liliopsida (= Monocotyledoneae)

Order
Alismatales

Family
Hydrocharitaceae

Genus
Najas

Species
guadelupensis

Taxon category: Accepted

Syn.: Najas microdon var. guadalupensis (Spreng.) A. Braun; in Wiggins & Porter (1971) as Najas microdon A. Braun. 21st June 2021 family changed from Najadaceae to Hydrocharitaceae (revised by Patricia Jaramilo & María del Mar Trigo, 2021)

Origin: Native

Distribution

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

Distribution: The native range of this species is America (POWO, 2023).

References

  • Wiggins, I.L. Porter, D.M. (1971) Flora of the Galapagos Islands Standford University Press, Stanford.
  • Hamann, O. (1979) Taxonomic and floristic notes from the Galapagos Island. Bot. Notiser 132: 435-440.
  • Adsersen, H. (s.a.) Field notes, 1974 and 1977 collections Charles darwin Research Station, unpublished Manuscript.
  • CONABIO (2009) Catálogo taxonómico de especies de México. Cap. nat. México 1.
  • 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.
  • 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/

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This page should be cited as follows:

"Galapagos Species Database, Najas guadelupensis", dataZone. Charles Darwin Foundation, https://datazone.darwinfoundation.org/en/checklist/?species=1013. Accessed 16 July 2025.