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Rottboellia cochinchinensis is an annual grass that invades disturbed and agricultural areas throughout the southeastern United States.

Foliage

Stems and leaves are covered with stiff, irritating hairs. Stems can reach a height of 1-10 ft. (0.3-3 m). Leaf blades are 5.9-17.7 in. (15-45 cm) long, 0.2-0.8 in. (5-20 mm) wide and flat.

Flowers

The inflorescence is a jointed, cylindrical raceme, 1-6 in. (2.5-15.24) long.

Fruit

Under favorable conditions, Rottboellia cochinchinensis starts producing seeds 6-7 weeks after emergence. Seed production continues throughout the growing season.

Ecological Threat

Rottboellia cochinchinensis invades agricultural fields and other disturbed areas. The hairs on the stems and leaves can cause severe irritation, and the plant is unpalatable to livestock and wildlife. It is native to the Old World tropics, but it is currently widespread throughout the world’s tropical regions and in the southeastern United States.

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Thu, 28 Mar 2024 20:40:31 -0400 Thu, 28 Mar 2024 20:40:31 -0400 http://Images.bugwood.org/ <![CDATA[itchgrass Rottboellia cochinchinensis]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1149132 itchgrass Rottboellia cochinchinensis]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1149132 <![CDATA[itchgrass Rottboellia cochinchinensis]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1149131 itchgrass Rottboellia cochinchinensis]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1149131 <![CDATA[itchgrass Rottboellia cochinchinensis]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1195027 itchgrass Rottboellia cochinchinensis]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1195027 <![CDATA[itchgrass Rottboellia cochinchinensis]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1195028 itchgrass Rottboellia cochinchinensis]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1195028 <![CDATA[itchgrass Rottboellia cochinchinensis]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5308075 itchgrass Rottboellia cochinchinensis]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5308075 <![CDATA[itchgrass Rottboellia cochinchinensis]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1149130 itchgrass Rottboellia cochinchinensis]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1149130 <![CDATA[itchgrass Rottboellia cochinchinensis]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5376736 itchgrass Rottboellia cochinchinensis]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5376736 <![CDATA[itchgrass Rottboellia cochinchinensis]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5376737 itchgrass Rottboellia cochinchinensis]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5376737 <![CDATA[itchgrass Rottboellia cochinchinensis]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5376738 itchgrass Rottboellia cochinchinensis]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5376738 <![CDATA[itchgrass Rottboellia cochinchinensis]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5376740 itchgrass Rottboellia cochinchinensis]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5376740