Lazarum johnsonianum
(A.Hay & S.Taylor) M.D.Barrett, A.Hay & Hett.
Pays · région · aire protégée · écorégion · biome
Graphe en cours d’indexation
Calcul du tissu écologique de Lazarum johnsonianum.
Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 5s).
Liste rouge IUCN
VU · Vulnérablecritères D1+2?Inconnue- Évaluation
- 2013 · v3.1
- Altitude
- 40 – 50 m
- Profondeur
- – m
État de la populationTexte officiel évaluation IUCNExpert
There are no population data available for this species, although Hay and Taylor (1996) estimated that there were less than 1,000 individuals within a conservation reserve. As the species is only known from a single protected area, this estimate infers that the total number of individuals within the population is also less than 1,000.
Menaces identifiées(6 menaces classées CMP-IUCN)
1_1Housing & urban areasFuture2_1_3Agro-industry farmingOngoing2_3_3Agro-industry grazing, ranching or farmingOngoing3_2Mining & quarryingOngoing7_1_3Trend Unknown/UnrecordedFuture8_2Problematic native species/diseasesOngoing
Description complète des menacesTexte détaillé évaluation IUCNExpert
This species is found in the Arnhem Land tropical savanna ecoregion which is considered to be "relatively stable/intact". The area around Darwin is increasingly being developed for agriculture. Overgrazing, mining, fire, and introduced feral species such as swamp buffalo are all causes for concern. Although the Black Jungle Reserve is only about 40 km from Darwin and 25 km from Palmerston, it is well managed and the population of this species is not likely to be threatened by the processes above.
Habitats préférentiels (classification IUCN)
1_5Forest - Subtropical/Tropical Dry2_1Savanna - Dry
Mesures de conservation recommandéesStratégies de conservation IUCNExpert
The species is found in the Black Jungle Conservation Reserve, which covers an area of 360 ha and is managed by the Northern Territory Government and the Northern Land Council. This species is in cultivation at the Darwin Botanic Gardens. Seed of the species has not yet been collected by the Millennium Seed Bank project.
This species has been assessed as "2KCi" using ROTAP codes (Hay and Taylor 1996):
2 - Geographic range in Australia less than 100 km
K - Poorly known, taxon that is suspected, but not definitely known, to belong to a threatened category; at present accurate field distribution information is inadequate
C - Reserved, indicates taxon has at least one population within a natural park, other proclaimed conservation reserve or in an area otherwise dedicated for the protection of flora; the taxon may or may not be considered adequately conserved within the reserve, as reflected by the conservation status assigned to it
i - less than 1,000 plants are known to occur within a conservation reserve
This species has been assessed as "2KCi" using ROTAP codes (Hay and Taylor 1996):
2 - Geographic range in Australia less than 100 km
K - Poorly known, taxon that is suspected, but not definitely known, to belong to a threatened category; at present accurate field distribution information is inadequate
C - Reserved, indicates taxon has at least one population within a natural park, other proclaimed conservation reserve or in an area otherwise dedicated for the protection of flora; the taxon may or may not be considered adequately conserved within the reserve, as reflected by the conservation status assigned to it
i - less than 1,000 plants are known to occur within a conservation reserve
Actions de conservation (1)Conservation Actions Classification Scheme — IUCNExpert
3_4_2Genome resource bank
Stress écologiques (10)Stresses Classification — IUCNExpert
1_1Ecosystem conversion1_1Ecosystem conversion1_1Ecosystem conversion1_1Ecosystem conversion1_2Ecosystem degradation1_2Ecosystem degradation1_2Ecosystem degradation1_2Ecosystem degradation1_2Ecosystem degradation1_2Ecosystem degradation
Priorités de recherche (2)Research Needed Classification — IUCNExpert
1_2Population size, distribution & trends1_3Life history & ecology
Niche IUCN globaleRealms · Systems · LMEs · Growth forms · FAOs — biogéographie IUCNExpert
Royaumes biogéographiques
Australasian
Systèmes (terrestre/eau douce/marin)
Terrestrial
Formes de croissance
Geophyte
Références bibliographiques (5)Sources scientifiques de l'évaluation IUCNExpert
- IUCN. 2013. IUCN Red List of Threatened Species (ver. 2013.1). Available at: <a href="http://www.iucnredlist.org">http://www.iucnredlist.org</a>. (Accessed: 12 June 2013).
- WCSP. 2008. World Checklist of Selected Plant Families. Facilitated by the Royal Botanic Gardens, Kew. Available at: <a href="http://www.kew.org/wcsp/monocots/">http://www.kew.org/wcsp/monocots/</a>. (Accessed: 2008).
- Woinarski, J. 2001. Arnhem Land tropical savanna (AA0701). Available at: <a href="worldwildlife.org/ecoregions/aa0701">worldwildlife.org/ecoregions/aa0701</a>.
- Hay, A. and Taylor, S.M. 1996. A new species of <i>Typhonium</i> Schott (Araceae-Areae) from the Northern Territory, with notes on the conservation status of two Areae endemic to the Tiwi Islands. <i>Telopea</i> 6: 563.
- Briggs, J.D. and Leigh, J.H. 1996. <i>Rare or Threatened Australian Plants</i>. Australian National Parks and Wildlife Service, Canberra.
Évaluateurs & contributeurs (2)Personnes ayant contribué à l'évaluation IUCNExpert
assessor
Crook, V.
evaluator
Scott, J.A.
Crook, V. 2013. Typhonium johnsonianum. The IUCN Red List of Threatened Species 2013: e.T44393445A44433842. Accessed on 05 May 2026.
Distribution mondiale
Calcul de la distribution GBIF· ~10–60 s
Phénologie
Calcul du calendrier d'apparition· ~5–30 s
Consulter sur les bases externes
Note nomenclaturale & synonymesDétails taxonomiques + synonymes CoLExpert
Note nomenclaturale
TAXREF v18 — INPN/MNHNSynonymes (1)— redirigent vers cette page
- Typhonium johnsonianumA.Hay & S.Taylor
Sources : Catalogue of Life Cross-References (synonymes) · TAXREF v18 INPN/MNHN (commentaires FR).