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| Web URL(s): | http://www.nrcresearchpress.com/doi/pdf/10.1139/b90-260
Last checked: 09/29/2015
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | Crompton, C. W.;
Stahevitch, A. E.;
Wojtas, W. A. |
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| Author Affiliation: | Biosystematics Research Centre, Agriculture Canada, Ontario, Canada |
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| Title: | Morphometric studies of the Euphorbia esula group (Euphorbiaceae) in North America |
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| Source: | Canadian Journal of Botany. Vol. 68, No. 9, September 1990, p. 1978-1988. |
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| Publishing Information: | Vancouver, British Columbia: The National Research Council of Canada. |
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| Related Web URL: | http://www.nrcresearchpress.com/doi/abs/10.1139/b90-260
Last checked: 09/29/2015
Notes: English abstract only |
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| Keywords: | TIC Keywords: Euphorbia agraria; Euphorbia cyparissias; Euphorbia esula; Euphorbia X pseudoesula; Pastures
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| Abstract/Contents: | "Leafy spurge and cypress spurge are important weeds of pastures and unimproved rangeland in western and eastern North America, respectively. Taxonomists disagree as to whether leafy spurge is a single variable species or an aggregate of two or more species. Morphometric techniques (clustering by incremental sum of squares and principal coordinate analysis) were used to analyze relationships in leafy spurge and its allies. On the basis of studying 26 morphological characters found in 200 collections representing 32 putative taxa, we concluded that in North America only four species should be recognized, namely, Euphorbia agraria Bieb., Euphorbia cyparissias L., Euphorbia esula L., and Euphorbia X pseudoesula Schur. A key to these taxa is provided. No authentic material of Euphorbia lucida Waldst. & Kitt, and Euphorbia salicifolia Host was found from this continent in the collections we examined." |
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| Language: | English |
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| References: | 53 |
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| Note: | Abstract also appears in French
Figures
Tables
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Appendix |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Crompton, C. W., A. E. Stahevitch, and W. A. Wojtas. 1990. Morphometric studies of the Euphorbia esula group (Euphorbiaceae) in North America. Can. J. Bot. 68(9):p. 1978-1988. |
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| Web URL(s):
http://www.nrcresearchpress.com/doi/pdf/10.1139/b90-260
Last checked: 09/29/2015
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: QK 1 .C3 |
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