johnsongrass
Sorghum halepense (L.) Pers.


Overview


Appearance
Sorghum halepense is a tall (up to 8 ft. [2.4 m]), rhizomatous, perennial grass that invades open areas throughout the United States.
Foliage
The 2 ft. (0.6 m) long, lanceolate leaves are arranged alternately along a stout, hairless, somewhat upward branching stem and have distinct, white midribs.
Flowers
Flowers occur in a loose, spreading, purplish panicle.
Fruit
Fruits are also produced in a panicle. Seeds form in the sessile spikelets.
Ecological Threat
Sorghum halepense is adapted to a wide variety of habitats including open forests, old fields, ditches and wetlands. It spreads aggressively and can form dense colonies which displace native vegetation and restrict tree seedling establishment. Sorghum halepense has naturalized throughout the world, but it is thought to be native to the Mediterranean region. It was first introduced into the United States in the early 1800s as a forage crop.

Resources


Selected Images



Maps



EDDMapS Distribution

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

State Regulated List

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

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.

Invasive Listing Sources


Taxonomic Rank


Kingdom: Plantae
Phylum: Magnoliophyta
Class: Liliopsida
Subclass: Commelinidae
Order: Cyperales
Family: Poaceae
Genus: Sorghum
Subject: Sorghum halepense (L.) Pers.

Synonyms and Other Names


Related Scientific Names:
Holcus halepensis (L.) Pers. (Synonym)
Sorghum miliaceum (L.) Pers. (Synonym)

Categories


Plants - Grass or Grasslike