[article]
| Titre : |
New species of Gamochaeta (Asteraceae: Gnaphalieae) from the eastern United States and comments on similar species |
| Type de document : |
texte imprimé |
| Auteurs : |
Guy Nesom, Auteur |
| Année de publication : |
2004 |
| Article en page(s) : |
pp. 717-741 |
| Langues : |
Anglais (eng) |
| Catégories : |
[ZG] États-Unis
[Espèces (in biblio)] Gamochaeta
|
| Résumé : |
"Gamochaeta argyrinea Nesom, sp. nov., is documented from 19 states, primarily in the southeastern U.S.A., and from Puerto Rico. It is a common and abundant species of ruderal habitats and has usually been identified within a broad concept of Gamochaeta purpurea, which has a similar but broader geographic range. Gamochaeta argyrinea apparently is most closely similar to G. ustulata, another species commonly identified as G. purpurea but native to the Pacific coast region of the U.S.A. and adjacent Canada. Gamochaeta chionesthes Nesom, sp. nov., is described from localities in Arkansas, Louisiana, Mississippi, Alabama, Georgia, Florida, South Carolina, and North Carolina - these plants also have been identified previously primarily as G. purpurea. A key and distribution maps are provided for the six species of Gamochaeta in the U.S.A. with strongly bicolored leaves: G. argyrinea, G. ustulata, G. chionesthes, G. purpurea, G. simplicicaulis, and G. coarctata. The name Gamochaeta americana has been misapplied to G. coarctata, but G. americana sensu stricto has not been documented for the U.S.A.; it occurs in the Antilles, Central America, Mexico, and South America and is reported to occur elsewhere as an adventive. In order to further clarify its identity, a technical description and commentary are provided for G. americana." (source : auteur) |
| Type de publication : |
périodique |
| Référence biblio : |
Nesom G., 2004 - New species of Gamochaeta (Asteraceae: Gnaphalieae) from the eastern United States and comments on similar species. SIDA, contributions to botany, 21 (2) : 717-741. |
| ID PMB : |
70882 |
| Permalink : |
http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=70882 |
in SIDA, contributions to botany > vol. 21, n°2 (Année 2004) . - pp. 717-741
[article]
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