Sorghum halepense(L.) Pers.

Johnson grass

WFO wfo-0000900376 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Sorghum halepense, photographed by Annika Lindqvist
fig. a Annika Lindqvist, CC BY 4.0 / 2022-06-11 / obs. 205264783
Sorghum halepense, photographed by Bonnie Semmling
fig. b Bonnie Semmling, CC BY 4.0 / obs. 205220897
Sorghum halepense, photographed by Morgan Hay
fig. c Morgan Hay, CC BY 4.0 / obs. 192355037
Sorghum halepense, photographed by Cleveland Powell
fig. d Cleveland Powell, CC BY 4.0 / obs. 191767225
Sorghum halepense, photographed by Annika Lindqvist
fig. e Annika Lindqvist, CC BY 4.0 / obs. 188930441
Sorghum halepense, photographed by Greg Tasney
fig. f Greg Tasney, CC BY-SA 4.0 / obs. 203466018
Sorghum halepense, photographed by Eduardo Luis Beltrocco
fig. g Eduardo Luis Beltrocco, CC BY 4.0 / obs. 195619340
Sorghum halepense, photographed by Eduardo Luis Beltrocco
fig. h Eduardo Luis Beltrocco, CC BY 4.0 / obs. 186926659

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Confused withby our own model

These are not lookalikes we guessed at. Each one is a species our identification model genuinely mistook for this plant, and how many times. The error rate is published.

Flowering n = 532 observations

Peak flowering in Jun, from 532 community-annotated observations worldwide. This is a global aggregate, not a forecast for your garden: the same species flowers on different dates in different hemispheres, and citizen-science records cluster near cities, at weekends, and in spring. Where a species has fewer than 30 annotated records we do not draw this chart at all.

Also published as 54 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Andropogon avenaceus Kunth
  • Andropogon crupina (Link) Kunth
  • Andropogon decolorans (Willd.) Kunth
  • Andropogon dubitatus Steud.
  • Andropogon dubius K.Koch ex B.D.Jacks.
  • Andropogon halepensis (L.) Brot.
  • Andropogon halepensis subsp. anatherus Piper
  • Andropogon halepensis subsp. muticus (Hack.) Piper
  • Andropogon halepensis var. anatherus Piper
  • Andropogon halepensis var. effusus Stapf
  • Andropogon halepensis var. genuinus Stapf
  • Andropogon halepensis var. muticus (Hack.) Asch. & Graebn.
  • Andropogon miliaceus Roxb.
  • Andropogon miliformis Schult.
  • Andropogon sorghum subsp. exiguus (Forssk.) Piper
  • Andropogon sorghum subsp. halepense (L.) Hack.
  • Andropogon sorghum subsp. halepensis (L.) Hack.
  • Andropogon sorghum subvar. genuinus Hack.
  • Andropogon sorghum subvar. leiocladus Hack.
  • Andropogon sorghum subvar. muticus Hack.
  • Andropogon sorghum subvar. trachycladus Hack.
  • Andropogon sorghum var. exiguum (Forssk.) Piper
  • Andropogon sorghum var. halepensis (L.) Hack.
  • Andropogon sorghum var. perennis Bertoni

and 30 more.

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.

We publish what we can source and we say so when we cannot. This page has no care advice, no toxicity claim and no native range, because we do not yet have those from a source we can cite.