Chromosome numbers of American Acanthaceae

A total of 72 meiotic chromosome numbers were determined for 58 taxa representing 23 genera of Acanthaceae from the United States, Mexico, Panama, and Peru. Chromosome numbers of 41 of these taxa are reported for the first time. Chromosome numbers obtained in Aphanosperma (n = 18), Chalarothyrsus (n...

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Bibliographic Details
Published in:Systematic botany 1990-01, Vol.15 (1), p.13-25
Main Authors: Daniel, T.F. (California Academy of Sciences, San Francisco, CA), Chuang, T.I, Baker, M.A
Format: Article
Language:English
Subjects:
ACANTHACEAE
Biological and medical sciences
Biological taxonomies
Chromosome morphology
CHROMOSOME NUMBER
Chromosomes
DISTRIBUCION NATURAL
DISTRIBUTION NATURELLE
ESTADOS UNIDOS DE AMERICA
ETATS-UNIS
Fundamental and applied biological sciences. Psychology
Genera
Herbs
MEXICO
MEXIQUE
NATURAL DISTRIBUTION
NOMBRE CHROMOSOMIQUE
NUMERO DE CROMOSOMAS
PANAMA
PEROU
PERU
Plant chromosomes
Plant cytology, morphology, systematics, chorology and evolution
Plants
Ploidies
PLOIDY
Shrubs
Spermatophyta
Systematics (diagnosis, chromosome numbers)
Taxa
TAXONOMIA
TAXONOMIE
TAXONOMY
USA
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Description
Summary:A total of 72 meiotic chromosome numbers were determined for 58 taxa representing 23 genera of Acanthaceae from the United States, Mexico, Panama, and Peru. Chromosome numbers of 41 of these taxa are reported for the first time. Chromosome numbers obtained in Aphanosperma (n = 18), Chalarothyrsus (n = 18), Gypsacanthus (n = 18), Ixtlania (n = 14), Razisea (n = 18), and Teliostachya (n = 9) are the first for these genera. Our counts for Dicliptera resupinata (n = 40), Elytraria imbricata (n = 12), Justicia pectoralis (n = 11), and Yeatesia mabryi (n = 18) differ from previously published numbers for these species. Constancy of chromosome number appears to be characteristic of certain genera of Acanthaceae whereas variation due to polyploidy and aneuploidy occurs in others. Various generic relationships are discussed with respect to the chromosome numbers now known for neotropical Acanthaceae.
ISSN:0363-6445
1548-2324
DOI:10.2307/2419011