Bothriochloa ischaemum(L.) Keng

King Ranch bluestem

WFO wfo-0000853799 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Bothriochloa ischaemum, photographed by Bonnie Semmling
fig. a Bonnie Semmling, CC BY 4.0 / 2022-06-02 / obs. 202721523
Bothriochloa ischaemum, photographed by Ljaž
fig. b Ljaž, CC BY 4.0 / obs. 174110016
Bothriochloa ischaemum, photographed by Thomas Koffel
fig. c Thomas Koffel, CC BY 4.0 / obs. 167179257
Bothriochloa ischaemum, photographed by Thomas Koffel
fig. d Thomas Koffel, CC BY 4.0 / obs. 167051250
Bothriochloa ischaemum, photographed by Cleveland Powell
fig. e Cleveland Powell, CC BY 4.0 / obs. 166320783
Bothriochloa ischaemum, photographed by Nathan May
fig. f Nathan May, CC BY 4.0 / obs. 164269504
Bothriochloa ischaemum, photographed by Roz Hunter
fig. g Roz Hunter, CC BY 4.0 / obs. 164593620
Bothriochloa ischaemum, photographed by Victor Engel
fig. h Victor Engel, CC BY 4.0 / obs. 164793189

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 = 296 observations

Peak flowering in Oct, from 296 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 34 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.

  • Amphilophis ischaemum (L.) Nash
  • Andropogon angustifolius Sm.
  • Andropogon annulatus J.A.Schmidt
  • Andropogon articulatus Dulac
  • Andropogon digitatus St.-Lag.
  • Andropogon ischaemum L.
  • Andropogon ischaemum f. songaricus (Rupr. ex Fisch. & C.A.Mey.) Kitag.
  • Andropogon ischaemum var. genuinus Hack.
  • Andropogon ischaemum var. ischaemum
  • Andropogon ischaemum var. laevifolius Hack.
  • Andropogon ischaemum var. racemosoverticillata Buia
  • Andropogon ischaemum var. ramosissimus Reyn.
  • Andropogon ischaemum var. ramosus F.Gérard
  • Andropogon ischaemum var. rubrocinctus Goiran
  • Andropogon ischaemum var. songaricus Rupr. ex Fisch. & C.A.Mey.
  • Andropogon ischaemum var. virescens K.Koch
  • Andropogon panormitanus Parl.
  • Andropogon patulus Moench
  • Andropogon pertusus var. panormitanus (Parl.) Hack.
  • Andropogon taiwanensis Ohwi
  • Andropogon villosus Lam.
  • Bothriochloa insculpta subsp. panormitana (Parl.) Giardina & Raimondo
  • Bothriochloa ischaemum f. ischaemum
  • Bothriochloa ischaemum f. songarica (Rupr. ex Fisch. & C.A.Mey.) Kitag.

and 10 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.