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Auteur Guy Nesom |
Documents disponibles écrits par cet auteur (5)
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(1704) Proposal to conserve the name Gnaphalium purpureum (Compositae: Gnaphalieae) with a conserved type / Guy Nesom in Taxon, vol. 54, n°4 (Année 2005)
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Titre : (1704) Proposal to conserve the name Gnaphalium purpureum (Compositae: Gnaphalieae) with a conserved type Type de document : texte imprimé Auteurs : Guy Nesom, Auteur ; John F. Gaskin, Auteur Année de publication : 2005 Article en page(s) : pp. 1103–1104 Langues : Anglais (eng) Catégories : [Espèces (in biblio)] Gnaphalium Mots-clés : systématique Type de publication : périodique Référence biblio : Nesom G., Gaskin J., 2005 - (1704) Proposal to conserve the name Gnaphalium purpureum (Compositae: Gnaphalieae) with a conserved type. Taxon, 54 (4) : 1103–1104. ID PMB : 70876 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=70876
in Taxon > vol. 54, n°4 (Année 2005) . - pp. 1103–1104[article]Exemplaires(0)
Disponibilité aucun exemplaire Distribution of Gamochaeta (Asteraceae : Gnaphalieae) in Texas, Oklahoma, Arkansas, and Louisiana / Guy Nesom in Journal of the Botanical research institute of Texas, vol. 1, n°2 (Année 2007)
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Titre : Distribution of Gamochaeta (Asteraceae : Gnaphalieae) in Texas, Oklahoma, Arkansas, and Louisiana Type de document : texte imprimé Auteurs : Guy Nesom, Auteur Année de publication : 2007 Article en page(s) : pp. 1125-1130 Langues : Anglais (eng) Catégories : [ZG] États-Unis
[Espèces (in biblio)] GamochaetaMots-clés : aire de répartition description Résumé : "Distributions of seven species of Gamochaeta are mapped at county level in Texas, Oklahoma, Arkansas, and Louisiana: G. antillana, G. argyrinea, G. calviceps, G. chionesthes, G. coarctata, G. pensylvanica, and G. purpurea. Gamochaeta purpurea is the only species known from pre-1900 collections. Gamochaeta coarctata and G. chionesthes are known only from collections made after 1967; the latter apparently is spreading rapidly but has not reached Texas and Oklahoma." (source : auteur) Type de publication : périodique Référence biblio : Nesom G., 2007 - Distribution of Gamochaeta (Asteraceae : Gnaphalieae) in Texas, Oklahoma, Arkansas, and Louisiana. Journal of the Botanical research institute of Texas, 1 (2) : 1125-1130. ID PMB : 70881 En ligne : http://www.botanicus.org/item/31753003495303 Format de la ressource électronique : document Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=70881
in Journal of the Botanical research institute of Texas > vol. 1, n°2 (Année 2007) . - pp. 1125-1130[article]Exemplaires(0)
Disponibilité aucun exemplaire Gamochaeta impatiens, sp. nov. (Asteraceae : Gnaphalieae), the USA adventive previously identified as G. coarctata / Guy Nesom in Phytoneuron, 2022 (Année 2022)
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Titre : Gamochaeta impatiens, sp. nov. (Asteraceae : Gnaphalieae), the USA adventive previously identified as G. coarctata Type de document : texte imprimé Auteurs : Guy Nesom, Auteur Année de publication : 2022 Article en page(s) : 48 p. Langues : Anglais (eng) Catégories : [Espèces (in biblio)] Gamochaeta americana
[Espèces (in biblio)] Gamochaeta coarctata
[Thèmes] Bibliographie
[Thèmes] Clé de détermination
[Thèmes] Morphologie végétaleMots-clés : description botanique Résumé : "A morphometric analysis (Freire et al. 2021) found no consistent difference between South American plants identified as Gamochaeta americana (Mill. 1768) Wedd. and Gamochaeta coarctata (Willd. 1803) Kerg. Their observation is confirmed here through examination of general collections as well as the types (from Jamaica and Uruguay, respectively). The widespread and common species in the southeastern USA, however, which mostly has been identified as G. coarctata, is not the same as the South American species. Instead it appears to be an adventive from South America without formal taxonomic recognition –– it is described here as Gamochaeta impatiens Nesom, sp. nov. Of the two, only G. impatiens occurs in the USA but G. americana and G. impatiens both are adventive in various parts of the world." (source : auteur) Type de publication : périodique Référence biblio : Nesom G., 2022 - Gamochaeta impatiens, sp. nov. (Asteraceae : Gnaphalieae), the USA adventive previously identified as G. coarctata. Phytoneuron, 35 : 48 p. ID PMB : 71459 En ligne : https://www.phytoneuron.net/wp-content/uploads/2022/04/35PhytoN-Gamochaetaameric [...] Format de la ressource électronique : document Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=71459
in Phytoneuron > 2022 (Année 2022) . - 48 p.[article]Exemplaires(0)
Disponibilité aucun exemplaire New species of Gamochaeta (Asteraceae: Gnaphalieae) from the eastern United States and comments on similar species / Guy Nesom in SIDA, contributions to botany, vol. 21, n°2 (Année 2004)
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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)] GamochaetaRésumé : "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]Exemplaires(0)
Disponibilité aucun exemplaire The taxonomic status of Gamochaeta (Asteraceae : Inuleae) and the species of the United States / Guy Nesom in Phytologia, vol. 68, n°3 (Année 1990)
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Titre : The taxonomic status of Gamochaeta (Asteraceae : Inuleae) and the species of the United States Type de document : texte imprimé Auteurs : Guy Nesom, Auteur Année de publication : 1990 Article en page(s) : pp. 186–198 Langues : Anglais (eng) Catégories : [ZG] États-Unis
[Espèces (in biblio)] Gamochaeta
[Espèces (in biblio)] Gamochaeta americana
[Espèces (in biblio)] Gamochaeta falcata
[Espèces (in biblio)] Gamochaeta pensylvanica
[Espèces (in biblio)] Gamochaeta purpurea
[Thèmes] TaxonomieMots-clés : Gamochaeta sphacilata Gamochaeta ustulata Résumé : "Gamochaeta is maintained as a separate genus apart from Gnaphalium. Descriptions, synonymy, general geographic ranges and a key are given for the six species of Gamochaeta that occur in the United States: G. americana (Miller) Wedd., G. falcata (Lam.) Cabrera, G. pensylvanica (Willd.) Cabrera, G. purpurea (L.) Cabrera, G. sphacilata (Kunth) Cabrera and G. ustulata (Nutt.) Nesom. The last species has been generally considered to be a synonvm of G. purpurea, but it is a distinctive endemic of the Pacific coast from California to southwestern British Columbia." (source : auteur) Type de publication : périodique Référence biblio : Nesom G., 1990 - The taxonomic status of Gamochaeta (Asteraceae : Inuleae) and the species of the United States. Phytologia, 68 (3) : 186–198. ID PMB : 69525 En ligne : http://www.biodiversitylibrary.org/part/16708 Format de la ressource électronique : document Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=69525
in Phytologia > vol. 68, n°3 (Année 1990) . - pp. 186–198[article]Exemplaires(0)
Disponibilité aucun exemplaire