AusTraits

Triunia youngiana

Explore the data for this taxon in the portal

Family Proteaceae

Taxonomy: Triunia youngiana (C.Moore & F.Muell.) L.A.S.Johnson & B.G.Briggs

Synonyms: 4 (APC 2026-07-30)
  • Helicia youngiana C.Moore & F.Muell. (nomenclatural synonym)
  • Helicia youngiana C.Moore & F.Muell. var. youngiana (nomenclatural synonym)
  • Helicia youngiana var. typica C.T.White (taxonomic synonym)
  • Macadamia youngiana (C.Moore & F.Muell.) Benth. (nomenclatural synonym)

Distribution (APC): Qld, NSW

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

Traits

Top source datasets: ABRS_1981 (2), ABRS_2022 (3), ABRS_2023 (14), Benwell_2024 (5), Butler_2004 (5), Chen_2017 (5), Cooper_2013 (10), Jordan_2015 (4), Jordan_2020 (8), Kooyman_2011 (13), McCarthy_2017 (14), NHNSW_2014_2 (4), NHNSW_2022 (3), NHNSW_2023 (20), RadfordSmith_2024 (40), Sjostrom_2006 (4), Wenk_2022 (2), Wenk_2023 (1), eFLOWER_Dun_2022 (21). See below for a full list of sources.
Summary: AusTraits contains 71 traits from 178 records in 19 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
flower morphology
  • flower_colour (categorical): pink (2); white_cream (2) [sources: NHNSW_2014_2; eFLOWER_Dun_2022]
  • sex_type (categorical): hermaphrodite (1) [sources: Sjostrom_2006]
fruit morphology
  • fruit_length (numerical): 13.5 mm (12-15 mm) [sources: Cooper_2013; NHNSW_2023]
  • fruit_width (numerical): 13.5 mm (12-15 mm) [sources: NHNSW_2023]
  • fruit_height (numerical): 13.5 mm (12-15 mm) [sources: NHNSW_2023]
  • fruit_type (categorical): drupe (5) [sources: ABRS_2023; Chen_2017; Cooper_2013; RadfordSmith_2024; Sjostrom_2006]
  • fruit_fleshiness (categorical): fleshy (3) [sources: Chen_2017; Cooper_2013; Sjostrom_2006]
  • fruit_dehiscence (categorical): indehiscent (5) [sources: ABRS_2023; Chen_2017; Cooper_2013; NHNSW_2023; Sjostrom_2006]
  • fruit_colour (categorical): blue (1); red (2) [sources: ABRS_2023; NHNSW_2023]
leaf morphology
  • leaf_area (numerical): 1832.52 mm2 (806.1-2820.61 mm2) [sources: McCarthy_2017; RadfordSmith_2024]
  • leaf_length (numerical): 90 mm (40-140 mm) [sources: ABRS_2023; Kooyman_2011; NHNSW_2023]
  • leaf_width (numerical): 23.67 mm (12-40 mm) [sources: ABRS_2023; Kooyman_2011; NHNSW_2023]
  • leaf_dry_mass (numerical): 238.66 mg (152.25-291.58 mg) [sources: RadfordSmith_2024]
  • petiole_length (numerical): 0.5 cm (0.3-0.8 cm) [sources: ABRS_2023; NHNSW_2023]
  • leaf_mass_per_area (numerical): 121.89 g/m2 (91.48-186.02 g/m2) [sources: McCarthy_2017; RadfordSmith_2024]
  • leaf_dry_matter_content (numerical): 0.52 g/g (0.47-0.57 g/g) [sources: RadfordSmith_2024]
  • leaf_shape (categorical): elliptical (2); lanceolate (1); narrowly_obovate (1); obovate (1) [sources: ABRS_2023; NHNSW_2023]
  • leaf_base_shape (categorical): cuneate (1) [sources: NHNSW_2023]
  • leaf_margin (categorical): entire (1); toothed (3) [sources: ABRS_2023; Jordan_2020; NHNSW_2023]
  • leaf_lobation (categorical): unlobed (1) [sources: Kooyman_2011]
  • leaf_compoundness (categorical): simple (4) [sources: ABRS_2023; Jordan_2020; Kooyman_2011; NHNSW_2023]
  • leaf_phyllotaxis (categorical): opposite (1) [sources: NHNSW_2014_2]
  • leaf_stomatal_density_abaxial (numerical): 235.56 {count}/mm2 (235.56-235.56 {count}/mm2) [sources: Jordan_2020]
  • plant_photosynthetic_organ (categorical): leaf (2) [sources: ABRS_2023; NHNSW_2023]
life history
  • plant_growth_form (categorical): shrub (5); tree (4) [sources: ABRS_2022; Butler_2004; Cooper_2013; Kooyman_2011; NHNSW_2022; Wenk_2022]
  • life_history (categorical): perennial (5) [sources: ABRS_2022; Jordan_2015; Jordan_2020; NHNSW_2022; Wenk_2023]
  • woodiness_detailed (categorical): woody (3) [sources: ABRS_2022; NHNSW_2022; Wenk_2022]
  • stem_growth_habit (categorical): prostrate (1) [sources: NHNSW_2014_2]
  • leaf_phenology (categorical): evergreen (3) [sources: ABRS_1981; Kooyman_2011; RadfordSmith_2024]
  • dispersal_syndrome (categorical): endozoochory (2) [sources: Butler_2004; RadfordSmith_2024]
  • dispersers (categorical): vertebrates (1) [sources: Butler_2004]
  • flowering_time (categorical): nnnnnnnnnyyy (1); ynnnnnnnyyyy (2); yynnnnnnyyyy (1) [sources: ABRS_1981; Chen_2017; Cooper_2013; NHNSW_2014_2]
  • seedbank_location (categorical): none (1) [sources: Benwell_2024]
  • bud_bank_location (categorical): bud-bearing_root (1) [sources: Benwell_2024]
seed morphology
  • seed_length (numerical): 9 mm (8-10 mm) [sources: Kooyman_2011]
  • seed_width (numerical): 8 mm (7-10 mm) [sources: Butler_2004; Kooyman_2011]
stem morphology
  • wood_density (numerical): 0.67 mg/mm3 (0.52-0.85 mg/mm3) [sources: Kooyman_2011; McCarthy_2017; RadfordSmith_2024]
whole plant morphology
  • plant_height (numerical): 3.67 m (3-4 m) [sources: ABRS_2023; Cooper_2013; NHNSW_2023]

Sources

dataset_idn_traitsn_recordsreference
RadfordSmith_20241440J. Radford-Smith, H. R. Lai, E. C. Weeren, and J. M. Dwyer. “A Functional Basis for the Assembly of Australian Subtropical Rainforest Tree Communities”. Ecology Letters 27.11 (2024). ISSN: 1461-0248. doi: 10.1111/ele.70014.
eFLOWER_Dun_20221821L. Dun and H. Sauquet. “Unpublished: Floral traits for GAP taxa, University of New South Wales, Australia”. 2022.
NHNSW_20231420N. 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_20231114Australian Biological Resources Study. Flora of Australia, Australian Biological Resources Study, Canberra.. accessed on 14 September, 2022.. 2023. url: http://www.ausflora.org.au.
McCarthy_2017314J. K. McCarthy, J. M. Dwyer, and K. Mokany. “A regional-scale assessment of using metabolic scaling theory to predict ecosystem properties”. Proceedings of the Royal Society B: Biological Sciences 286.1915 (2019), p. 20192221. doi: 10.1098/rspb.2019.2221.
Kooyman_2011913R. Kooyman, M. Rossetto, W. Cornwell, and M. Westoby. “Phylogenetic tests of community assembly across regional to continental scales in tropical and subtropical rain forests”. Global Ecology and Biogeography 20 (2011), pp. 707-716. doi: 10.1111/j.1466-8238.2010.00641.x.
Cooper_2013910W. Cooper and W. T. Cooper. Australian rainforest fruits. CSIRO Publishing, 2013, p. 272.
Jordan_202088G. J. Jordan, R. J. Carpenter, B. R. Holland, N. J. Beeton, M. D. Woodhams, and T. J. Brodribb. “Links between environment and stomatal size through evolutionary time in Proteaceae”. Proceedings of the Royal Society B: Biological Sciences 287.1919 (2020), p. 20192876. doi: 10.1098/rspb.2019.2876.
Benwell_202455A. Benwell. “Fire responses of flora in a sclerophyll-rainforest vegetation complex in the Nightcap Range, North Coast, New South Wales”. Australian Journal of Botany 72.1 (2024). Ed. by D. Williams. ISSN: 1444-9862. doi: 10.1071/bt23049.
Butler_200455D. W. Butler, R. J. Green, D. Lamb, W. J. F. Mcdonald, and P. I. Forster. “Biogeography of seed-dispersal syndromes, life-forms and seed sizes among woody rain-forest plants in Australia's subtropics”. Journal of Biogeography 34.10 (2007), pp. 1736-1750. ISSN: 1365-2699. doi: 10.1111/j.1365-2699.2007.01734.x.
Chen_201755Chen, S.-C., Cornwell, W., Z. H.-X., Moles, and A. T. “Plants show more flesh in the tropics: Variation in fruit type along latitudinal and climatic gradients.”. Ecography 40 (2017), pp. 531-538. doi: abs/10.1111/ecog.02010.
Jordan_201544G. J. Jordan, R. J. Carpenter, A. Koutoulis, A. Price, and T. J. Brodribb. “Environmental adaptation in stomatal size independent of the effects of genome size”. New Phytologist 205.2 (2015), pp. 608-617. doi: 10.1111/nph.13076.
NHNSW_2014_244Royal Botanic Gardens Sydney. PLantNET: NSW flora online. 2014. url: http://plantnet.rbgsyd.nsw.gov.au/.
Sjostrom_200644A. 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.
ABRS_202233Australian Biological Resources Study. Flora of Australia, Australian Biological Resources Study, Canberra.. accessed on 14 September, 2022.. 2022. url: http://www.ausflora.org.au.
NHNSW_202233N. 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/.
ABRS_198122B. A. Barlow, H. T. Clifford, A. S. George, and A. K. A. McCusker. Flora of Australia. 1981. url: http://www.environment.gov.au/biodiversity/abrs/online-resources/flora/main/.
Wenk_202222E. Wenk. “Unpublished data: Australian plant growth forms dataset”. 2022.
Wenk_202311E. Wenk. “Unpublished data: Australian plant life history dataset, University of New South Wales, Sydney”. 2023.