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Phenology of Chrysothamnus viscidiflorus subspecies viscidiflorus (Hook.) Nutt.

Published online by Cambridge University Press:  12 June 2017

James A. Young  and
Raymond A. Evans
James A. Young
Affiliation:
Agr. Res. Serv., U. S. Dep. of Agr., Renewable Resource Center, Univ. of Nevada, Reno, NV 89502
Raymond A. Evans
Affiliation:
Agr. Res. Serv., U. S. Dep. of Agr., Renewable Resource Center, Univ. of Nevada, Reno, NV 89502
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Abstract

The configuration of the growth pattern for Chrysothamnus viscidiflorus (Hook.) Nutt. was determined from vegetative bud burst to flowering. Important portions of the pattern are: restrictive growth during early spring, accelerated growth in late spring when the optimum susceptibility to herbicides occurs, and a leveling off of growth before flowering. Seedlings and young plants have a more rapid and greater annual stem elongation than mature or senescent plants. Elongation during the accelerated growth period can be predicted from early spring growth with moderate precision when soil moisture and temperatures are not limiting. Populations growing on sites of higher or lower elevations or of pronounced aspect will have growth patterns moderately varying from the modal populations. The greatest factor influencing the growth pattern on years with adequate soil moisture was competition from other species and the combination of competition and age of the rabbitbrush plants.

Type
Research Article
Information
Weed Science , Volume 22 , Issue 5 , September 1974 , pp. 469 - 475
Copyright
Copyright © 1974 by the Weed Science Society of America 

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References

Literature Cited

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