Hymenachne amplexicaulis

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Family Poaceae

Taxonomy: Hymenachne amplexicaulis (Rudge) Nees

Synonyms: 10 (APC 2026-07-30)

Agrostis monostachya Poir. (taxonomic synonym)
Hymenachne myosurus (Rich.) Nees (taxonomic synonym)
Panicum amplexicaule Rudge (nomenclatural synonym)
Panicum amplexicaule var. deflexa Döll (taxonomic synonym)
Panicum amplexicaule var. deflexum Döll (taxonomic synonym)
Panicum amplexicaule var. erecta Döll (taxonomic synonym)
Panicum amplexicaule var. erectum Döll (taxonomic synonym)
Panicum hymenachne Desv. (taxonomic synonym)
Panicum myosuros Rich. (taxonomic synonym)
Panicum myosurus Rich. (taxonomic synonym)

Distribution (APC): NT (naturalised), Qld (naturalised), NSW (naturalised)

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

Traits

Top source datasets: NHNSW_2022 (5), NHNSW_2023 (8), NTH_2022 (4), NTH_2023 (8), Simpson_2021 (2), Sjostrom_2006 (4), Wenk_2022 (2), Wenk_2023 (1). See below for a full list of sources.
Summary: AusTraits contains 17 traits from 34 records in 8 datasets.

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

fire response

resprouting_capacity (categorical): resprouts (1) [sources: Simpson_2021]

flower morphology

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

fruit morphology

fruit_type (categorical): caryopsis (3) [sources: NHNSW_2023; NTH_2023; Sjostrom_2006]
fruit_fleshiness (categorical): dry (1) [sources: Sjostrom_2006]
fruit_dehiscence (categorical): indehiscent (1) [sources: Sjostrom_2006]

leaf morphology

leaf_length (numerical): 232.5 mm (50-400 mm) [sources: NHNSW_2023; NTH_2023]
leaf_width (numerical): 52 mm (8-128 mm) [sources: NHNSW_2023; NTH_2023]
leaf_shape (categorical): linear (1); narrowly_triangular (1) [sources: NTH_2023]
leaf_lamina_posture (categorical): flat (1) [sources: NTH_2023]
leaf_phyllotaxis (categorical): alternate (1) [sources: NHNSW_2023]
plant_photosynthetic_organ (categorical): leaf (2) [sources: NHNSW_2023; NTH_2023]

life history

plant_growth_form (categorical): graminoid (3); herb (2) [sources: NHNSW_2022; NTH_2022; Wenk_2022]
life_history (categorical): perennial (4) [sources: NHNSW_2022; NTH_2022; Simpson_2021; Wenk_2023]
plant_growth_substrate (categorical): aquatic (1) [sources: NHNSW_2022]
woodiness_detailed (categorical): herbaceous (3) [sources: NHNSW_2022; NTH_2022; Wenk_2022]
stem_growth_habit (categorical): decumbent (1); mat-forming (1); stoloniferous (1) [sources: NHNSW_2022; NTH_2022]

whole plant morphology

plant_height (numerical): 3.5 m (3.5-3.5 m) [sources: NHNSW_2023]

Sources

dataset_id	n_traits	n_records	reference
NHNSW_2023	6	8	N. H. of New South Wales. The Plant Information Network System of The Royal Botanic Gardens and Domain Trust Version 2.0.. accessed on 6 May, 2022.. 2023. url: https://plantnet.rbgsyd.nsw.gov.au/.
NTH_2023	6	8	D. of Land Resource Management and N. T. of Australia. Northern Territory Flora Online. accessed on 6 May, 2022.. 2022. url: http://eflora.nt.gov.au/.
NHNSW_2022	5	5	N. H. of New South Wales. The Plant Information Network System of The Royal Botanic Gardens and Domain Trust Version 2.0.. accessed on 6 May, 2022.. 2022. url: https://plantnet.rbgsyd.nsw.gov.au/.
NTH_2022	4	4	D. of Land Resource Management and N. T. of Australia. Northern Territory Flora Online. accessed on 6 May, 2022.. 2022. url: http://eflora.nt.gov.au/.
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.
Simpson_2021	2	2	K. J. Simpson, E. C. Jardine, S. Archibald, E. J. Forrestel, C. E. R. Lehmann, G. H. Thomas, and C. P. Osborne. “Resprouting grasses are associated with less frequent fire than seeders”. New Phytologist 230 (2021), pp. 832-844. doi: 10.1111/nph.17069.
Wenk_2022	2	2	E. Wenk. “Unpublished data: Australian plant growth forms dataset”. 2022.
Wenk_2023	1	1	E. Wenk. “Unpublished data: Australian plant life history dataset, University of New South Wales, Sydney”. 2023.