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A Nursery Study of Leafy Spurge (Euphorbia spp.) Complex from North America

Published online by Cambridge University Press:  12 June 2017

Duane H. Ebke  and
Melvin K. McCarty
Duane H. Ebke
Affiliation:
Dep. Agron., Univ. of Nebraska
Melvin K. McCarty
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., Lincoln, NB 68583
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Abstract

Live root material of leafy spurge (Euphorbia spp.) was collected from 38 locations across northern United States, southern Canada, and from 1 location in Austria. These materials were established in a nursery at Lincoln, Nebraska along with E. agraria M. Bieb. and E. cyparissias L. # EPHCY. Nineteen vegetative and reproductive characters, taken from various taxonomic keys, were measured on plants established for a period of 3 yr. Data were compared with previous taxonomic keys of Euphorbia species. A key developed by A. Radcliffe-Smith was used to separate the nursery entries. Leaf width measurements were the most useful taxonomic criteria. Five morphologically separable taxa were observed: E. × pseudovirgata (Schur) Soó, E. esula L. # EPHES, E. uralensis Fisch. ex Link., E. agraria M. Bieb., and E. cyparissias L.

Keywords

Euphorbia × pseudovirgataE. esulaE. uralensisE. cyparissiasplant variationtaxonomyEPHCYEPHESweed nursery
Type
Research Article
Information
Weed Science , Volume 31 , Issue 6 , November 1983 , pp. 866 - 873
Copyright
Copyright © 1983 Weed Science Society of America 

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