Skip to main content
SpringerLink
Log in

Cytotaxonomic notes on eleven species of Cirsium native to Mexico

  • Published:
Brittonia Aims and scope Submit manuscript

Abstract

Data on chromosome numbers in eleven species and three forms ofCirsium are presented. The species treated areC. nivale (H.B.K.) Schultz Bip.,C. jorullense (H.B.K.) Spreng.,C. durangense (Greenman) Ownbey,C. ochrocentrum Gray,C. undulatum (Nutt.) Spreng.,C. velatum (Wats.) Petrak,C. mexicanum DC.,C. rhaphilepis (Hemsley) Petrak,C. occidentalis (Nutt.) Jepson subsp.acrolepis Petrak,C. conspicuum (Sweet) Schultz Bip., andC. ehrenbergii Schultz Bip. A case of autotriploidy is reported forC. durangense. Natural hybridization betweenC. durangense and a form ofC. mexicanum is reported. Photomicrographs of the mitotic or meiotic chromosomal configurations of nine species and two forms are reproduced.C. ochrocentrum Gray var.durangense Greenman is raised to species rank.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

Literature Cited

  • Conger, A. D. &Lucile M. Fairchild. 1953. A quick-freeze method for making smear slides permanent. Stain Tech.28: 281–283.

    CAS  Google Scholar 

  • Frankton, C. &R. J. Moore. 1961. Cytotaxonomy, phylogeny, and Canadian distribution ofCirsium undulatum andCirsium flodmanii. Canadian Jour. Bot.39: 21–33.

    Article  Google Scholar 

  • —. 1963. Cytotaxonomy ofCirsium muticum, Cirsium discolor, andCirsium altissimum. Canadian Jour. Bot.41: 73–84.

    Google Scholar 

  • Hsi, Yu-tseng. 1960. Taxonomy, distribution and relationships of the species ofCirsium belonging to the seriesUndulata. Thesis: Ph.D. Univ. Minnesota. (University Microfilms, Ann Arbor, Michigan.)

    Google Scholar 

  • Ownbey, G. B. &Yu-tseng Hsi. 1963. Chromosome numbers in some North American species of the genusCirsium. Rhodora65: 339–354.

    Google Scholar 

  • -. 1968. Chromosome numbers in some North American species of the genusCirsium. II. Western United States. Madroño (in press).

  • Petrak, F. 1910. Die mexikanischen und zentral-amerikanischen Arten der GattungCirsium. Beih. Bot. Centralbl.27 (Abt. 2): 207–255.

    Google Scholar 

  • — 1911. BeitrÄge zur Kenntnis der mexikanischen und zentral-amerikanischen Cirsien. Bot. Tidssk.31: 57–72.

    Google Scholar 

  • — 1917. Die nordamerikanischen Arten der GattungCirsium. Beih. Bot. Centralbl.35 (Abt. 2): 223–567.

    Google Scholar 

  • Snow, R. 1963. Alcoholic hydrochloric acid-carmine as a stain for chromosomes in squash preparations, Stain Tech.38: 9–13.

    CAS  Google Scholar 

  • Stoutamire, W. P. &J. H. Benimm. 1960. Chromosome studies of Mexican alpine plants. Brittonia12: 226–230.

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. University of Minnesota, Minneapolis

    Gerald B. Ownbey

Authors
  1. Gerald B. Ownbey
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

This study was supported by National Science Foundation grant GB-2727. The following individuals were of great assistance in obtaining seeds and specimens necessary for the work: Miles F. Johnson, James M. Muggli, Gary R. Baker, Robert M. King, and Hugh H. Iltis. Mrs. Siu-tsun Hsi rendered valuable assistance in the preparation of cytological materials. Costs of publication were met in part from the Junior F. Hayden Memorial Fund, Dept. of Botany, University of Minnesota.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Ownbey, G.B. Cytotaxonomic notes on eleven species of Cirsium native to Mexico. Brittonia 20, 336–342 (1968). https://doi.org/10.2307/2805691

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.2307/2805691

Keywords

Search

Navigation