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Full access Systematic relationships in the narrow-leaved species of chenopodium of the Western United States / Daniel J. Crawford in Brittonia, vol. 27, n°3 (Année 1975)

Public [article]  inBrittonia > vol. 27, n°3 (Année 1975) . - pp. 279-288 Titre : Full access Systematic relationships in the narrow-leaved species of chenopodium of the Western United States Type de document : texte imprimé Auteurs : Daniel J. Crawford, Auteur Année de publication : 1975 Article en page(s) : pp. 279-288 Langues : Anglais (eng) Catégories : [ZG] États-Unis [Espèces (in biblio)] Chenopodium Résumé : "In a study of ten taxa of Chenopodium occurring primarily in the western United States and designated as the narrow-leaved complex, data from morphology, flavonoid chemistry, and somatic chromosome karyotypes were correlated. All taxa produce 3-O-glycosides of quercetin and/or isorhamnetin. The six taxa examined for chromosome number were found to be diploid (2n z 18). Chenopodium atrovirens, C. desiccatum var. leptophylloides, and C. leptophyllum, producing the same array of flavonoids and with similar yet distinctive somatic chromosomes, are closely related, and C. desiccatum var. leptophyUoides is considered to be a distinct species, C. pratericola. Chenopodium desiccatum var. desiccatum and C. hians show reduced flavonoid complements and have similar karyotypes. Chromosomal and chemical evidence suggests that plants heretofore included in C. incognitum represent two biological entities, one similar to C. atrovirens and another identical to C. hians. Morphological and chemical data indicate that C. subglabrum, C. cycloides, and C. pallescens are closely related. The flavonoid chemistry and morphology of C. albescens suggest a close relationship to C. atrovirens and C. pratericola." (source : auteur) Type de publication : périodique Référence biblio : Crawford D., 1975 - Full access Systematic relationships in the narrow-leaved species of chenopodium of the Western United States. Brittonia, 27 (3) : 279-288. ID PMB : 50407 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=50407 [article]

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