Myriophyllum caput-medusae

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Family Haloragaceae

Taxonomy: Myriophyllum caput-medusae Orchard

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

Myriophyllum elatinoides Gaudich. (pro parte misapplied)

Distribution (APC): SA, NSW, Vic

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

Traits

Top source datasets: ABRS_2022 (5), ABRS_2023 (13), Draper_2023 (3), NHNSW_2014_2 (1), NHNSW_2022 (4), NHNSW_2023 (11), RBGV_2022 (4), RBGV_2023 (13), Sjostrom_2006 (4), Wenk_2022 (2), Wenk_2023 (1), White_2020 (20), Williams_2011 (12). See below for a full list of sources.
Summary: AusTraits contains 44 traits from 93 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.

fire response

resprouting_capacity (categorical): resprouts (1) [sources: White_2020]

flower morphology

flower_colour (categorical): red_brown (1); yellow_orange (1) [sources: NHNSW_2014_2]
sex_type (categorical): dioecious (1); monoecious (1) [sources: ABRS_2022; Sjostrom_2006]

fruit morphology

fruit_length (numerical): 1.47 mm (1.4-1.5 mm) [sources: ABRS_2023; NHNSW_2023; RBGV_2023]
fruit_type (categorical): mericarp (3); nut (1) [sources: ABRS_2023; NHNSW_2023; RBGV_2023; Sjostrom_2006]
fruit_fleshiness (categorical): dry (1) [sources: Sjostrom_2006]
fruit_dehiscence (categorical): indehiscent (1) [sources: Sjostrom_2006]
fruit_colour (categorical): brown (3); green (1) [sources: ABRS_2023; NHNSW_2023; RBGV_2023]

leaf morphology

leaf_length (numerical): 10.42 mm (6-20 mm) [sources: ABRS_2023; NHNSW_2023; RBGV_2023]
leaf_width (numerical): 3 mm (3-3 mm) [sources: NHNSW_2023]
leaf_shape (categorical): oblong (3); ovate (3) [sources: ABRS_2023; NHNSW_2023; RBGV_2023]
leaf_margin (categorical): entire (3) [sources: ABRS_2023; NHNSW_2023; RBGV_2023]
leaf_compoundness (categorical): simple (3) [sources: ABRS_2023; NHNSW_2023; RBGV_2023]
leaf_phyllotaxis (categorical): alternate (3); whorled (3) [sources: ABRS_2023; NHNSW_2023; RBGV_2023]
plant_photosynthetic_organ (categorical): leaf (3) [sources: ABRS_2023; NHNSW_2023; RBGV_2023]

life history

photosynthetic_pathway (categorical): c3 (2) [sources: White_2020; Williams_2011]
plant_growth_form (categorical): herb (6) [sources: ABRS_2022; NHNSW_2022; RBGV_2022; Wenk_2022; White_2020; Williams_2011]
life_form (categorical): hydrophyte (1) [sources: Williams_2011]
life_history (categorical): perennial (4) [sources: ABRS_2022; NHNSW_2022; RBGV_2022; Wenk_2023]
plant_growth_substrate (categorical): aquatic (4) [sources: ABRS_2022; NHNSW_2022; RBGV_2022; Williams_2011]
woodiness_detailed (categorical): herbaceous (4) [sources: ABRS_2022; NHNSW_2022; RBGV_2022; Wenk_2022]
stem_growth_habit (categorical): floating (1) [sources: Williams_2011]
nitrogen_fixing (categorical): non_nitrogen_fixer (2) [sources: White_2020; Williams_2011]
root_structure (categorical): non_mycorrhizal (1) [sources: Williams_2011]
parasitic (categorical): not_parasitic (1) [sources: White_2020]
pollination_syndrome (categorical): abiotic (1); wind (1) [sources: Draper_2023; White_2020]
pollination_system (categorical): abiotic (1) [sources: Williams_2011]
dispersal_syndrome (categorical): epizoochory (1); hydrochory (1); zoochory (1) [sources: Draper_2023; White_2020; Williams_2011]
dispersers (categorical): birds (2); fish (1) [sources: Draper_2023; White_2020]
flowering_time (categorical): yyynnnnnnyyy (1) [sources: White_2020]
seedbank_longevity_class (categorical): persistent (1) [sources: White_2020]
vegetative_reproduction_ability (categorical): vegetative (1) [sources: White_2020]
clonal_spread_mechanism (categorical): non_clonal (1) [sources: Williams_2011]

whole plant morphology

plant_physical_defence_structures (categorical): absent (1) [sources: White_2020]

Sources

dataset_id	n_traits	n_records	reference
White_2020	20	20	M. White, S. Sinclair, and D. Frood. Victorian Vital Attributes Database. database. Department of Environment, Land, Water and Planning, Victoria, 2020.
ABRS_2023	9	13	Australian Biological Resources Study. Flora of Australia, Australian Biological Resources Study, Canberra.. accessed on 14 September, 2022.. 2023. url: http://www.ausflora.org.au.
RBGV_2023	9	13	VicFlora. Flora of Victoria, Royal Botanic Gardens Victoria. accessed on 6 May, 2022.. 2023. url: https://vicflora.rbg.vic.gov.au/.
Williams_2011	12	12	R. P. Duncan, S. E. Clemants, R. T. Corlett, A. K. Hahs, M. A. McCarthy, M. J. McDonnell, M. W. Schwartz, K. Thompson, P. A. Vesk, and N. S. G. Williams. “Plant traits and extinction in urban areas: a meta-analysis of 11 cities”. Global Ecology and Biogeography 20.4 (2011), pp. 509-519. doi: 10.1111/j.1466-8238.2010.00633.x.
NHNSW_2023	10	11	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/.
ABRS_2022	5	5	Australian Biological Resources Study. Flora of Australia, Australian Biological Resources Study, Canberra.. accessed on 14 September, 2022.. 2022. url: http://www.ausflora.org.au.
NHNSW_2022	4	4	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/.
RBGV_2022	4	4	VicFlora. Flora of Victoria, Royal Botanic Gardens Victoria. accessed on 6 May, 2022.. 2022. url: https://vicflora.rbg.vic.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.
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.
Wenk_2022	2	2	E. Wenk. “Unpublished data: Australian plant growth forms dataset”. 2022.
NHNSW_2014_2	1	1	Royal Botanic Gardens Sydney. PLantNET: NSW flora online. 2014. url: http://plantnet.rbgsyd.nsw.gov.au/.
Wenk_2023	1	1	E. Wenk. “Unpublished data: Australian plant life history dataset, University of New South Wales, Sydney”. 2023.