Triodia helmsii

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Family Poaceae

Taxonomy: Triodia helmsii (C.E.Hubb.) Lazarides

Synonyms: 1 (APC 2026-07-30)

Plectrachne helmsii C.E.Hubb. (nomenclatural synonym)

Misapplied names: 1 (APC 2026-07-30)

Triraphis bromoides F.Muell. (misapplied)

Distribution (APC): WA, NT, SA

Profiles: APC, Flora of Australia, ALA, iNaturalist, NT eFlora, SA eFlora, Florabase, ATRP

Traits

Top source datasets: ABRS_2022 (3), ABRS_2023 (9), Draper_2023 (3), GrassBase_2014 (6), NHNSW_2014 (1), Osborne_2014 (1), SAH_2014 (3), SAH_2022 (3), Sjostrom_2006 (4), WAH_2022_2 (4), WAH_2023_2 (3), Wenk_2022 (2), Wenk_2023 (1). See below for a full list of sources.
Summary: AusTraits contains 19 traits from 43 records in 13 datasets.

Traits by category (click to expand). For categorical traits, the values are listed. For numerical traits, the mean and range are shown.

flower morphology

sex_type (categorical): hermaphrodite (1) [sources: Sjostrom_2006]

fruit morphology

fruit_type (categorical): caryopsis (3) [sources: ABRS_2023; Sjostrom_2006; WAH_2023_2]
fruit_fleshiness (categorical): dry (1) [sources: Sjostrom_2006]
fruit_dehiscence (categorical): indehiscent (1) [sources: Sjostrom_2006]

leaf morphology

leaf_length (numerical): 124.17 mm (40-230 mm) [sources: ABRS_2023; GrassBase_2014; SAH_2014]
leaf_width (numerical): 1.25 mm (1-2 mm) [sources: ABRS_2023; GrassBase_2014]
leaf_lamina_posture (categorical): conduplicate (1) [sources: ABRS_2023]
leaf_phyllotaxis (categorical): alternate (1) [sources: ABRS_2023]
plant_photosynthetic_organ (categorical): leaf (1) [sources: ABRS_2023]

life history

photosynthetic_pathway (categorical): c4 (1) [sources: Osborne_2014]
plant_growth_form (categorical): graminoid (2); herb (2); hummock (2); tussock (1) [sources: ABRS_2022; SAH_2022; WAH_2022_2; Wenk_2022]
life_history (categorical): perennial (4) [sources: ABRS_2022; SAH_2022; WAH_2022_2; Wenk_2023]
woodiness_detailed (categorical): herbaceous (4) [sources: ABRS_2022; SAH_2022; WAH_2022_2; Wenk_2022]
stem_growth_habit (categorical): caespitose (1) [sources: WAH_2022_2]
pollination_syndrome (categorical): self (1); wind (1) [sources: Draper_2023]
dispersal_syndrome (categorical): anemochory (1) [sources: Draper_2023]
dispersers (categorical): wind (1) [sources: Draper_2023]
flowering_time (categorical): nnnnnyyyyynn (1) [sources: NHNSW_2014]

whole plant morphology

plant_height (numerical): 0.88 m (0.5-1.3 m) [sources: ABRS_2023; GrassBase_2014; SAH_2014; WAH_2023_2]

Sources

dataset_id	n_traits	n_records	reference
ABRS_2023	7	9	Australian Biological Resources Study. Flora of Australia, Australian Biological Resources Study, Canberra.. accessed on 14 September, 2022.. 2023. url: http://www.ausflora.org.au.
GrassBase_2014	3	6	W. Clayton, M. Vorontsova, and K. H. &. H. Williamson. GrassBase - The online world grass flora. 2006. url: http://www.kew.org/data/grasses-db.html.
Sjostrom_2006	4	4	A. Sjöström and C. L. Gross. “Life-history characters and phylogeny are correlated with extinction risk in the Australian angiosperms”. Journal of Biogeography 33.2 (2006), pp. 271-290. doi: 10.1111/j.1365-2699.2005.01393.x.
WAH_2022_2	4	4	Western Australian Herbarium. Florabase—the Western Australian Flora.. accessed on 14 September, 2022.. 2022. url: https://florabase.dpaw.wa.gov.au/.
ABRS_2022	3	3	Australian Biological Resources Study. Flora of Australia, Australian Biological Resources Study, Canberra.. accessed on 14 September, 2022.. 2022. url: http://www.ausflora.org.au.
Draper_2023	3	3	J. T. Draper, S. Delean, J. G. Conran, P. Weinstein, and B. S. Simpson. “Life-history characteristics and climate correlates of dioecious plant species in central southern Australia”. Australian Journal of Botany unknown.unknown (2023), p. unknown. doi: 10.1071/BT22110.
SAH_2014	2	3	J. P. Jessop and H. R. Toelken. Flora of South Australia, 4th edition, 4 vols. Electronic version curated by J. Kellermann, State Herbarium of South Australia.. Government Printer, Adelaide, 1986.
SAH_2022	3	3	S. H. of South Australia. eFlora of SA, Electronic Flora of South Australia. accessed on 6 May, 2022.. 2022. url: http://www.flora.sa.gov.au/.
WAH_2023_2	2	3	Western Australian Herbarium. Florabase—the Western Australian Flora.. accessed on 14 September, 2022.. 2023. url: https://florabase.dpaw.wa.gov.au/.
Wenk_2022	2	2	E. Wenk. “Unpublished data: Australian plant growth forms dataset”. 2022.
NHNSW_2014	1	1	Royal Botanic Gardens Sydney. PLantNET. 2014. url: http://plantnet.rbgsyd.nsw.gov.au/search/simple.htm.
Osborne_2014	1	1	C. Osborne, A. Salomaa, T. Kluyver, V. Visser, E. Kellogg, O. Morrone, M. Vorontsova, W. Clayton, and D. Simpson. “A global database of C4 photosynthesis in grasses”. New Phytologist 204 (2014), pp. 441-446. doi: 10.1111/nph.12942.
Wenk_2023	1	1	E. Wenk. “Unpublished data: Australian plant life history dataset, University of New South Wales, Sydney”. 2023.