Acaciella angustissima(Mill.) Britton & Rose

prairie acacia

WFO wfo-0000182389 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Acaciella angustissima, photographed by saltyhiker
fig. a saltyhiker, CC BY 4.0 / 2022-06-01 / obs. 202672526
Acaciella angustissima, photographed by Daniel McNair
fig. b Daniel McNair, CC BY 4.0 / obs. 164680225
Acaciella angustissima, photographed by Craig Martin
fig. c Craig Martin, CC0 1.0 / obs. 156146497
Acaciella angustissima, photographed by Peter Valentine
fig. d Peter Valentine, CC BY 4.0 / obs. 151196005
Acaciella angustissima, photographed by Cleveland Powell
fig. e Cleveland Powell, CC BY 4.0 / obs. 147905419
Acaciella angustissima, photographed by Annika Lindqvist
fig. f Annika Lindqvist, CC BY 4.0 / obs. 145465746
Acaciella angustissima, photographed by Haley Daniels
fig. g Haley Daniels, CC BY 4.0 / obs. 144698979
Acaciella angustissima, photographed by Reid Hardin
fig. h Reid Hardin, CC BY 4.0 / obs. 138222111

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.

Native range 29 botanical countries

Regions where Acaciella angustissima is native: Arizona, Arkansas, California, Florida, Kansas, Louisiana, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Missouri, New Mexico, Oklahoma, Texas, Argentina Northwest, Belize, Bolivia, Colombia, Costa Rica, Ecuador, El Salvador, Guatemala, Honduras, Nicaragua, Panamá, Peru, Venezuela ArizonaArkansasCaliforniaFloridaKansasLouisianaMexico CentralMexico GulfMexico NortheastMexico NorthwestMexico SoutheastMexico SouthwestMissouriNew MexicoOklahomaTexasArgentina NorthwestBelizeBoliviaColombiaCosta RicaEcuadorEl SalvadorGuatemalaHondurasNicaraguaPanamáPeruVenezuela
Native distribution of Acaciella angustissima, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows.
RegionTDWG codeContinent
Arizona ARI NORTHERN AMERICA
Arkansas ARK
California CAL
Florida FLA
Kansas KAN
Louisiana LOU
Mexico Central MXC
Mexico Gulf MXG
Mexico Northeast MXE
Mexico Northwest MXN
Mexico Southeast MXT
Mexico Southwest MXS
Missouri MSO
New Mexico NWM
Oklahoma OKL
Texas TEX
Argentina Northwest AGW SOUTHERN AMERICA
Belize BLZ
Bolivia BOL
Colombia CLM
Costa Rica COS
Ecuador ECU
El Salvador ELS
Guatemala GUA
Honduras HON
Nicaragua NIC
Panamá PAN
Peru PER
Venezuela VEN

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Flowering 119 in flower of 150 examined

Peak flowering in Aug. Each bar is the share of Acaciella angustissima observations in which someone actually recorded the reproductive state and found the plant in flower, not the raw number of flowering records. That distinction matters: people observe plants far more in spring than in winter, so a bare count of flowering records partly measures when people go outside. Dividing by the number examined removes that. 119 of 150 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 5 months have fewer than 5 examined observations, so no proportion is drawn for them. This is still a global aggregate and not a forecast for your garden: the same species flowers on different dates in different hemispheres. Where a species has fewer than 30 flowering records we do not draw this chart at all. Computed from 10.15468/dl.cgje2x.

Also published as 69 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.

  • Acacia angulosa Bertol.
  • Acacia angustissima (Mill.) Kuntze
  • Acacia angustissima subsp. smithii (Britton & Rose) Wiggins
  • Acacia angustissima subsp. suffrutescens (Rose) Wiggins
  • Acacia angustissima subsp. typica Wiggins
  • Acacia angustissima var. chisosiana Isely
  • Acacia angustissima var. cuspidata (Schltdl.) L.D.Benson
  • Acacia angustissima var. filicioides (Cav.) Kuntze
  • Acacia angustissima var. frutescens Isely
  • Acacia angustissima var. glabrata (Schltdl.) Kuntze
  • Acacia angustissima var. hirta (Nutt.) B.L.Rob.
  • Acacia angustissima var. oaxacana B.L.Turner
  • Acacia angustissima var. smithii (Britton & Rose) L.Rico
  • Acacia angustissima var. suffrutescens (Rose) Isely
  • Acacia angustissima var. texensis (Torr. & A.Gray) Isely
  • Acacia boliviana Rusby
  • Acacia chlorantha Zucc.
  • Acacia cuspidata Schltdl.
  • Acacia delicata (Britton & Rose) Bullock
  • Acacia elegans M.Martens & Galeotti
  • Acacia elegans Schltdl.
  • Acacia filicina Willd.
  • Acacia filicina f. hirsuta (Schltdl.) Pittier
  • Acacia filicioides (Cav.) Branner & Coville

and 45 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.
  3. USDA PLANTS Database. common name, checklist symbol ACAN11. public domain. Retrieved 2026-07-13.
  4. Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

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