Monograph of the genus elodea (hydrocharitaceae): part 2. the species found in the andes and western south america

The genus Elodea Richard in Michaux was first published in 1803(Fl. Bor.-Am. 1: 20, 1803), based upon the single species. E. Canadensis from Montreal, Quebec, Canada. Though this was stated to have perfect flowers, it is now certain that the holotype specimens and the plants in nature are dioecious....

Full description

Autores:
St. John, Harold
Tipo de recurso:
Article of journal
Fecha de publicación:
1964
Institución:
Universidad Nacional de Colombia
Repositorio:
Universidad Nacional de Colombia
Idioma:
spa
OAI Identifier:
oai:repositorio.unal.edu.co:unal/43234
Acceso en línea:
https://repositorio.unal.edu.co/handle/unal/43234
http://bdigital.unal.edu.co/33332/
Palabra clave:
Ciencias Naturales
Biología
Plantas
animales
Historia Natural
Paleobotánica
Paleozoología
Genus Elodea
Hydrocharitaceae
Elodea Matthewsii
Ciencias Naturales
Biología
Plantas
animales
Historia Natural
Paleobotánica
Paleozoología
Genus Elodea
Hydrocharitaceae
Elodea Matthewsii
Rights
openAccess
License
Atribución-NoComercial 4.0 Internacional
Description
Summary:The genus Elodea Richard in Michaux was first published in 1803(Fl. Bor.-Am. 1: 20, 1803), based upon the single species. E. Canadensis from Montreal, Quebec, Canada. Though this was stated to have perfect flowers, it is now certain that the holotype specimens and the plants in nature are dioecious. Very abundant are plants bearing pistillate flowers with three stigmas and three acicular staminodia. Staminate plants are rare, but occur throughout the natural range of the species. Their flowers have nine stamens, but no trace of a gynoecium. Two well known species are now separated and placed in the genus Egeria Planch., a group just monographed by the writer. Left in Elodeaare seventeen species. These are to be found in two broad areas, the northern ones in the United Statesand southern Canada; the southern ones in South America. As yet there is no evidence of any indigenous species of Elodea in Central America.