Stem Morphology and Anatomy in Amaranthus L. (Amaranthaceae), Taxonomic Significance

Stem Morphology and Anatomy in Amaranthus L. (Amaranthaceae), Taxonomic Significance

The range of variation within the genus Amaranthus L. (Amaranthaceae) is described for a number of stem characters including: morphology, epidermis, primary stem vasculature and mechanism of secondary growth. The results provide new characters (phyllotaxy, complexity of leaf vascular supply and rela...

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Veröffentlicht in:The journal of the Torrey Botanical Society 2001-07, Vol.128 (3), p.254-281
Hauptverfasser: Costea, Mihai, DeMason, Darleen A.
Format: Artikel
Sprache:eng
Schlagworte:
Amaranth
Anatomy
Biological taxonomies
Cambium
Cardiovascular system
Epidermal cells
Internodes
Phyllotaxis
Plant growth
Plants
Symposium: Biology of the Amaranthaceae-Chenopodiaceae Alliance
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Zusammenfassung:The range of variation within the genus Amaranthus L. (Amaranthaceae) is described for a number of stem characters including: morphology, epidermis, primary stem vasculature and mechanism of secondary growth. The results provide new characters (phyllotaxy, complexity of leaf vascular supply and relative amount of secondary growth) that support (1) a new infrageneric classification (subgenus Amaranthus vs subgenus Albersia (Kunth)Gren. & Dodr.), and (2) the separation within the "hybridus" complex of cultivated amaranths (A. caudatus L., A. cruentus L. and A. hypochondriacus L.) from their presumed wild ancestors (A. hybridus L. subsp. quitensis (Kunth) Costea & Carretero, A. hybridus L. subsp. hybridus and A. powellii S. Wats. subsp. powellii respectively).
ISSN:1095-5674
1940-0616
DOI:10.2307/3088717