Interim profile, incomplete information
Spermacoce verticillata seedlings grow slowly at first but begin rapid growth after about 6 months. Twenty-three 9- month-old nursery plants averaged 64 cm in height with a maximum of 109 cm. S. verticillata shrubs appears to live at least 4 years and probably much longer in Puerto Rico. It is controlled in crops and pasture by cultivation, mowing, and
spraying with broadleaf herbicides. The importance value of S. verticillata in a Colombian pasture was reduced by 39 percent by simply fertilizing with potassium and sulfur to increase the vigor of the pasture grasses (Tejos 1981, in Francis, undated).
1. Francis, John K., undated. Spermacoce verticillata L. Rubiaceae. Research Forester, U.S. Department of Agriculture, Forest Service, International Institute of Tropical Forestry, Jardín Botánico Sur, 1201 Calle Ceiba, San Juan PR 00926-1119, in cooperation with the University of Puerto Rico, Río Piedras, PR 00936-4984
Summary: Available from: http://www.fs.fed.us/global/iitf/pdf/shrubs/Spermacoce%20verticillata.pdf [Accessed 25 October 2009]
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