Disakisperma dubium(Kunth) P.M.Peterson & N.Snow

green sprangletop

WFO wfo-0001329273 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Disakisperma dubium, photographed by Dominic Gentilcore
fig. a Dominic Gentilcore, CC BY 4.0 / 2021-08-22 / obs. 153198296
Disakisperma dubium, photographed by Cleveland Powell
fig. b Cleveland Powell, CC BY 4.0 / obs. 136570796
Disakisperma dubium, photographed by Benjamin Bender
fig. c Benjamin Bender, CC BY 4.0 / obs. 125517534
Disakisperma dubium, photographed by jim isleib
fig. d jim isleib, CC0 1.0 / obs. 97140621
Disakisperma dubium, photographed by Cleveland Powell
fig. e Cleveland Powell, CC BY 4.0 / obs. 69495109
Disakisperma dubium, photographed by Matt Lavin
fig. f Matt Lavin, CC BY 4.0 / obs. 109817083
Disakisperma dubium, photographed by Cecelia Alexander
fig. g Cecelia Alexander, CC0 1.0 / obs. 13324799
Disakisperma dubium, photographed by Sam Kieschnick
fig. h Sam Kieschnick, CC BY 4.0 / obs. 11035595

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.

The specimen a real sheet, in a real collection

Herbarium
The New York Botanical Garden
Accession
1735892
Filed as
Disakisperma dubium (Kunth) P.M.Peterson & N.Snow
Det. by
N. W. Snow 2018-01-01
Collected
not recorded
Origin
not recorded
The sheet
View the digitised specimen (CC BY 4.0)

A real pressed plant, in a real collection, under the accession number above. Not an illustration of one. The holding institution does not serve this sheet’s image to third parties, so there is no photograph here. The record is real and the link goes to it. Where we hold no openly licensed sheet for a species this section is simply absent, and where a sheet never recorded who determined it, that field stays empty rather than being filled in. Roughly half of all herbarium sheets never recorded a determiner, which is ordinary.

Native range 22 botanical countries

Regions where Disakisperma dubium is native: Arizona, Colorado, Florida, Mexico Central, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Mississippi, New Mexico, New York, North Carolina, Oklahoma, South Carolina, Texas, Argentina Northeast, Argentina Northwest, Bolivia, Colombia, Ecuador, Honduras, Peru ArizonaColoradoFloridaMexico CentralMexico NortheastMexico NorthwestMexico SoutheastMexico SouthwestMississippiNew MexicoNew YorkNorth CarolinaOklahomaSouth CarolinaTexasArgentina NortheastArgentina NorthwestBoliviaColombiaEcuadorHondurasPeru
Native distribution of Disakisperma dubium, 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
Colorado COL
Florida FLA
Mexico Central MXC
Mexico Northeast MXE
Mexico Northwest MXN
Mexico Southeast MXT
Mexico Southwest MXS
Mississippi MSI
New Mexico NWM
New York NWY
North Carolina NCA
Oklahoma OKL
South Carolina SCA
Texas TEX
Argentina Northeast AGE SOUTHERN AMERICA
Argentina Northwest AGW
Bolivia BOL
Colombia CLM
Ecuador ECU
Honduras HON
Peru PER

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.

Where it actually grows measured, from 936 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -1.8 °C 5.1 °C 7.4 °C
Warmest month, mean daily high 29.0 °C 33.8 °C 35.1 °C
Annual rainfall 337 mm 778 mm 1,007 mm
Rainfall in the driest quarter 27 mm 131 mm 189 mm

It is found where winters bring light frost. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 936 research-grade observations of Disakisperma dubium that carry a coordinate, and this is the range those places actually span. The 5th and 95th percentiles are used rather than the minimum and maximum, because a single cultivated specimen in a heated conservatory should not widen a tropical plant's range to the Arctic.

This is not a hardiness zone. A USDA zone is the average annual extreme minimum temperature. The figure above is the mean daily minimum of the coldest month, which is a different quantity and is typically far warmer. Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one.

Also published as 27 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.

  • Chloris dubia Kunth
  • Diplachne dubia (Kunth) Scribn.
  • Diplachne dubia var. aristata Vasey
  • Diplachne dubia var. humboldtiana Kuntze
  • Diplachne dubia var. kurtziana Kuntze
  • Diplachne dubia var. pringleana Kuntze
  • Diplachne mendocina (Phil.) Kurtz
  • Diplachne patens (J.Presl) É.Desv.
  • Diplachne pringlei Vasey ex Beal
  • Disakisperma mexicana Steud.
  • Eragrostis mendocina (Phil.) Jedwabn.
  • Festuca obtusiflora Willd. ex Spreng.
  • Ipnum mendocinum Phil.
  • Leptochloa digitatiformis Beetle
  • Leptochloa dubia (Kunth) Nees
  • Leptochloa dubia subsp. patens (J.Presl) Covas & Steibel
  • Leptochloa dubia var. humboldtiana Beetle
  • Leptochloa dubia var. pringleana (Kuntze) Scribn. & Merr.
  • Leptochloa obtusiflora Steud.
  • Leptochloa patens (J.Presl) Kunth
  • Leptochloa pringlei Beal
  • Leptostachys dubia (Kunth) G.Mey.
  • Molinia retusa Griseb. ex E.Fourn.
  • Rabdochloa dubia (Kunth) Stuck.

and 3 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 LEDU. 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.