BugwoodWiki Article

itchgrass
Rottboellia cochinchinensis (Lour.) W.D. Clayton

Overview

Appearance
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.

Selected Images


1149131
1149131

itchgrass
Rottboellia cochinchinensis
Plant(s)
USDA APHIS PPQ Archive
1149132
1149132

itchgrass
Rottboellia cochinchinensis
Plant(s)
USDA APHIS PPQ Archive
1149130
1149130

itchgrass
Rottboellia cochinchinensis
Plant(s)
USDA APHIS PPQ Archive
1195027
1195027

itchgrass
Rottboellia cochinchinensis
Spikelet(s)
Julia Scher
1195028
1195028

itchgrass
Rottboellia cochinchinensis
Fruit(s)
Julia Scher
5308075
5308075

itchgrass
Rottboellia cochinchinensis
Fruit(s)
Steve Hurst
5376736
5376736

itchgrass
Rottboellia cochinchinensis
Seedling(s)
Julia Scher
5376737
5376737

itchgrass
Rottboellia cochinchinensis
Feature(s)
Julia Scher
5376738
5376738

itchgrass
Rottboellia cochinchinensis
Feature(s)
Julia Scher
5376740
5376740

itchgrass
Rottboellia cochinchinensis
Fruit(s)
Julia Scher

Maps


EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. For more information, visit www.eddmaps.org

EDDMapS Distribution

State Regulated List - This map identifies those states that list this species on their regulated list. For more information, visit Invasive.org

State Regulated List

Most Troublesome / Most Common Agricultural Weed List
This map identifies those states that consider this species either most troublesome or most common in at least one commodity. For more information, visit the MTMC project page.

State Regulated List
Legend
   No Data for this state
   Troublesome or Common weed in one or more crops

Taxonomic Rank

Kingdom: Plantae
Phylum: Magnoliophyta
Class: Liliopsida
Subclass: Commelinidae
Order: Cyperales
Family: Poaceae
Genus: Rottboellia

Other System Links

Plants: ROCO6
Bayer: ROOEX
GRIN: 310370
ITIS: 504836
NPDN Pest: PCACOBA

Synonyms and Other Names

Other Common Names:
corngrass, raoulgrass

Related Scientific Names:

Aegilops exaltata (Lour.) W.D. Clayton(Synonym)
Manisuris exaltata (Lour.) W.D. Clayton(Synonym)
Rottboellia exaltata (Lour.) W.D. Clayton(Synonym)

Categories

Category: Grass or Grasslike