Hostname: page-component-cd9895bd7-jkksz Total loading time: 0 Render date: 2024-12-18T16:39:19.865Z Has data issue: false hasContentIssue false
  • English
  • Français

A Nursery Study of Large-Flowered Taxa of Carduus

Published online by Cambridge University Press:  12 June 2017

M. K. McCarty
M. K. McCarty*
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Lincoln, NE 68583
Get access Rights & Permissions [Opens in a new window]

Abstract

Populations of large-flowered taxa of Carduus from many locations in the United States and Canada were grown in a common nursery from 1975 to 1983 at Lincoln, NE. Dates of first bloom and associated degree-day accumulation data exhibited some consistent relationships. Four species appeared to be represented in the collection. These included Carduus thoermeri Wein., C. macrocephalus Desf., and musk thistle (C. nutans L. ♯ CRUNU). A collection from British Columbia should be accorded species status but apparently has not been named in the literature. Interbreeding has taken place in the nursery and these combinations are intermediate between C. thoermeri and C. macrocephalus and between C. thoermeri and the British Columbia material. Some morphological characteristics supported these separations.

Keywords

Degree-day accumulationCarduus thoermeriC. macrocephalusC. nutansCRUNU
Type
Weed Biology and Ecology
Information
Weed Science , Volume 33 , Issue 5 , September 1985 , pp. 664 - 668
Copyright
Copyright © 1985 by the Weed Science Society of America 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Literature Cited

1. Dunn, P. H. 1976. Distribution of Carduus nutans, C. acanthoides, C. pycnocephalus, and C. crispus, in the United States. Weed Sci. 24:518–524.Google Scholar
2. Fernald, M. L. 1960. Gray's Manual of Botany. American Book Co., New York. 1632 pp.Google Scholar
3. Gilmore, E. C. Jr. and Rogers, J. S. 1958. Heat units as a method of measuring maturity in corn. Agron. J. 50:611–615.CrossRefGoogle Scholar
4. Gleason, H. A. 1952. The New Britton and Brown Illustrated Flora of the Northeastern United States and Adjacent Canada. Vol. 3. Lancaster Press, Lancaster, PA. 589 pp.Google Scholar
5. Johnson, M. F. 1974. Cynarae (Asteraceae) in Virginia: Cirsium, Carduus, Onopordum . Virginia J. Sci. 25:152–160.Google Scholar
6. Kazmi, S.M.A. 1964. Revision der Gattung Carduus (Compositae). Teil II. Mitt. d. Bot. Staatssammlung Munchen V:279–550.Google Scholar
7. McCarty, M. K., Gorz, H. J., and Haskins, F. A. 1980. Inheritance of flower color in musk thistle (Carduus thoermeri). Weed Sci. 28:347–352.CrossRefGoogle Scholar
8. McCarty, M. K. and Scifres, C. J. 1969. Life cycle studies with musk thistle. Nebraska Agric. Exp. Stn. Res. Bull. 230. 15 pp.Google Scholar
9. Russelle, M. P., Wilhelm, W. W., Olson, R. A., and Power, J. F. 1984. Growth analysis based on degree days. Crop Sci. 24:28–32.CrossRefGoogle Scholar
10. Stone, J. F. 1983. On Julian Day notation for meteorological conditions. Agric. Meteorol. 29:137–140.Google Scholar
11. Stuckey, R. L. and Forsyth, J. L. 1971. Distribution of naturalized Carduus nutans (Compositae) mapped in relation to geology in northwestern Ohio. Ohio J. Sci. 71:1–15.Google Scholar
12. Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M., and Webb, D. A. 1976. Flora Europaea. Vol. 4. Cambridge University Press. 505 pp.Google Scholar