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Nassella trichotoma; photograph (c) Elspeth Swan, some rights reserved (CC BY) CC BY(c) Elspeth Swan, some rights reserved (CC BY) · observed growing wild · 2026-04-18

Nassella trichotoma (Nees) Hack. & Arechav.

Serrated tussock grass; Yass River tussock; Nassella tussock; Serrated tussock

Poaceae · Brazil South, Argentina Northeast +3

No habitat climate
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Nassella trichotoma, photograph (c) Elspeth Swan, some rights reserved (CC BY)Nassella trichotoma, photograph (c) Elspeth Swan, some rights reserved (CC BY)Nassella trichotoma, photograph (c) Elspeth Swan, some rights reserved (CC BY)Nassella trichotoma, photograph (c) c_knut_lord, some rights reserved (CC BY)Nassella trichotoma, photograph (c) c_knut_lord, some rights reserved (CC BY)Nassella trichotoma, photograph (c) c_knut_lord, some rights reserved (CC BY) 65 photographs ›

Summary

Nassella trichotoma, commonly known as the serrated tussock, is a type of bunchgrass plant, native in Argentina, Uruguay, Chile, and Peru.

Quoted from Wikipedia, "Nassella trichotoma", CC BY-SA 4.0.

Cultivation

Nothing derived: no habitat climate for this species.

Climate across the habitat

No habitat climate can be derived: Only 1 distinct land cell of the climate grid holds an in-range record placed to within 10 km; three are needed for an envelope. 7 of the 8 in-range records are placed to worse than 10 km, or to no stated accuracy and fewer than three decimals or by something other than a person's observation, and cannot place a climate cell, though they count for the map and its marker.

Natural habitat

Native range as published by WCVP.
Openly licensed records inside the range, framed on where they fall.
NativeBrazil South, Argentina Northeast, Argentina South, Argentina Northwest, Uruguay · introduced: Great Britain, Germany, France, Italy, Madeira, Cape Provinces, New South Wales, South Australia, Tasmania, Victoria, New Zealand North, New Zealand South, Illinois, Kentucky, North Carolina, South Carolina · regions are the level-3 units of the World Geographical Scheme for Recording Plant Distributions, as Kew's World Checklist records ranges, some under historical names such as Yugoslavia or Czechoslovakia (how).
Kew's description“perennial” · “temperate” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 8 georeferenced records inside the native range; the map shows only the 7 openly licensed ones, which alone would put the marker in the same place. 1020 records outside the WCVP native range not used. Under a dozen records behind the map. No climate across the range is derived for this species. 7 in-range records are placed to worse than 10 km, or with no stated accuracy (admitted only as a person's observation to three decimals), and stay on the map but off the climate.

Photographs

Nassella trichotoma, photograph 1did not loadNassella trichotoma, photograph 2did not loadNassella trichotoma, photograph 3did not loadNassella trichotoma, photograph 4did not loadNassella trichotoma, photograph 5did not loadNassella trichotoma, photograph 6did not load

Photographs: (c) Elspeth Swan, some rights reserved (CC BY) (3); (c) c_knut_lord, some rights reserved (CC BY) (3).

Other Nassella 7 in the reference

Nassella cernua Nassella cernua Nodding needlegrass Photo: CC BY, Sula VanderplankNassella lepida Nassella lepida Foothill needlegrass Photo: CC0, author not statedNassella leucotricha Nassella leucotricha Texas Wintergrass Photo: CC BY, RachelNassella neesiana Nassella neesiana American Needle-grass Photo: CC BY, Dave RichardsonNassella pulchra Nassella pulchra Purple needlegrass Photo: CC BY, Alexander WentworthNassella tenuissima Nassella tenuissima Argentine Needle-grass Photo: CC BY-SA, Bruno AlzugarayNassella viridula Nassella viridula Green needlegrass Photo: CC BY, Jackson Irvin

Names & registers

Also known as Agrostis trichotoma; Caryochloa trichotoma; Oryzopsis trichotoma; Piptatherum macrantherum; Piptatherum macratherum and 6 more. (GBIF Backbone)

GBIFPOWOIPNIWFOWikidataWikipediaiNaturalist

The record

Family
Poaceae
Described by
(Nees) Hack. & Arechav.
Native to
Brazil South, Argentina Northeast, Argentina South +2
Wild records
8 in range · 7 open

Every figure here is derived from public data by a stated rule and names its source; nothing about this species is written for its page by a person or by AI, apart from the marked, credited quotations. How →

Where this page came from built 2026-10-22
GBIF species record gbif.species answeredasked 2026-10-22
GBIF synonyms gbif.synonyms answeredasked 2026-10-22
GBIF common names gbif.vernacular answeredasked 2026-10-22names fetched 2026-10-22
WCVP native range wcvp.distribution answeredas of 2026-06-04
GBIF occurrence records gbif.occurrences answeredas of 2026-10-21GBIF occurrence download https://doi.org/10.15468/dl.hbdw64, of 2026-10-21; 1 record within 1 km of a botanic garden, herbarium or zoo left out (1 at a botanic garden or arboretum; Wikidata's list)
Habitat climate climate nothing to reportasked 2026-10-22only 1 distinct land cell of the climate grid holds an in-range record placed to within 10 km; three are needed for an envelope
Wikidata wikidata answeredasked 2026-10-22found by its label; its IPNI identifier 167243-2 is Kew's for Nassella trichotoma (Nees) Hack. & Arechav.
Wikipedia wikipedia answeredasked 2026-10-22
iNaturalist photographs, wild inat.photos.wild answeredasked 2026-10-22from iNaturalist's open data of 2026-09-27: research-grade observations with an open-licence photograph, the 24 whose photographs iNaturalist received last (the open data holds no votes); filled 2026-10-22
iNaturalist photographs, cultivated inat.photos.cultivated not asked
GBIF media gbif.media answeredasked 2026-10-22none of the photographs on this page is credited to GBIF: those shown are other sources', and GBIF's were the same photographs or were set aside by the photograph rules
Wikimedia Commons commons answeredasked 2026-10-22
OpenAlex papers openalex not askednot yet asked for this reference; a later fill takes the papers from OpenAlex's snapshot

Every source is recorded as having answered, reported nothing, refused, failed, not been asked, or answered twice where one answer is taken (“not taken: two items answered”), and, for a source asked when this page was built, when: the figures are as the source held them that day; a source read from a file (Kew's World Checklist, a GBIF download) says "as of" the file's day instead; a row carried from an earlier build of the page names that build instead. Only “nothing to report” is ever shown as an absence. Records came from 19 datasets via GBIF.org; each carries its own licence.

Cultifolio

Opening your plants…