Cycas hongheensis
S.Y.Yang & S.L.Yang ex D.Yue Wang
Pays · région · aire protégée · écorégion · biome
Graphe en cours d’indexation
Calcul du tissu écologique de Cycas hongheensis.
Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 5s).
Liste rouge IUCN
CR · En danger critiquecritères A2cd+4cd; B2ab(iii,v)↘Décroissante- Évaluation
- 2023 · v3.1
- Altitude
- 400 – 600 m
- Profondeur
- – m
État de la populationTexte officiel évaluation IUCNExpert
The population is small. During surveys conducted in 2019, about 1,100 individuals were found in the two subpopulations (X. Feng. pers com; Xi et al. 2022). The population is estimated to have declined by ca. 50% between 1991 and 2001 (Guan et al. 2018) and is considered to have reduced significantly again over the past decade resulting in an overall decline of between 80% and 85%. However, monitoring and protection by the Gejiu Management Institute of the Daweishan National Nature Reserve, has stabilised the subpopulation there and artificial pollination has resulted in successful seed set and seedling recruitment in this subpopulation.
Menaces identifiées(1 menace classée CMP-IUCN)
5_2_1Intentional use (species is the target)Very Rapid DeclinesMajority (50-90%)Ongoing
Description complète des menacesTexte détaillé évaluation IUCNExpert
The primary threat to Cycas hongheensis has been intensive harvesting for sale as ornamentals, killing many plants and blocking reproduction in survivors. Some subpopulations have started to recover and seed set and seedling recruitment is now evident. At least two subpopulations are now within a protected area and are monitored (X. Feng and A. Lindström pers. comm.).
Habitats préférentiels (classification IUCN)
3_5Shrubland - Subtropical/Tropical Dry★6Rocky areas (eg. inland cliffs, mountain peaks)
Mesures de conservation recommandéesStratégies de conservation IUCNExpert
This species is listed in Appendix II of CITES. At least two subpopulations are protected in the 430 km2 Daweishan National Nature Reserve, where monitoring and protection by the Gejiu Management Institute has stabilised the population and artificial pollination is supporting seedling recruitment (X. Feng pers com). Further monitoring, together with collection of seeds for propagation and the reintroduction into habitat have been identified as further priority actions (Xi et al. 2022).
Actions de conservation (3)Conservation Actions Classification Scheme — IUCNExpert
3_3_1Reintroduction3_4_1Captive breeding/artificial propagation4_3Awareness & communications
Stress écologiques (2)Stresses Classification — IUCNExpert
2_1Species mortality2_3_8Other
Usage & commerce (1)Use & Trade — IUCNExpert
13Pets/display animals, horticultureinternationalnationalsubsistance
Priorités de recherche (4)Research Needed Classification — IUCNExpert
1_2Population size, distribution & trends1_4Harvest, use & livelihoods1_6Actions3_1Population trends
Niche IUCN globaleRealms · Systems · LMEs · Growth forms · FAOs — biogéographie IUCNExpert
Royaumes biogéographiques
Indomalayan
Systèmes (terrestre/eau douce/marin)
Terrestrial
Formes de croissance
CycadShrub - large
Références bibliographiques (8)Sources scientifiques de l'évaluation IUCNExpert
- IUCN. 2023. The IUCN Red List of Threatened Species. Version 2023-1. Available at: <a href="www.iucnredlist.org">www.iucnredlist.org</a>. (Accessed: 07 December 2023).
- Xi, H., Wang, Y., Pan, Y., Xu, T., Zhan, Q., Liu, J., Feng, X. and Gong, X. 2022. Resources and protection of <i>Cycas</i> plants in China. <i>Biodiversity Science</i> 30: 21495.
- Guan, M.M., Zhou, W. and Xun, G. 2018. Conservation genetics of the cycad <i>Cycas hongheensis</i>. In: N. Li, D.W. Stevenson and M.P. Griffiths (eds), The 9th International Conference on Cycad Biology.
- Liu, J., Lindstrom, A.J. and Gong, X. 2016. Supplementary description of <i>Cycas hongheensis</i> (Cycadaceae) from Yunnan, China and its phylogenetic position. <i>Phytotaxa</i> 257(1): 71-80.
- Hill, K.D. 2008. The genus <i>Cycas</i> (Cycadaceae) in China. <i>Telopea</i> 12(1): 71-118.
- Bonta, M. and Osborne, R. 2007. Cycads in the vernacular: A compendium of local names. Proceedings of the 7th International Conference on Cycad Biology, Xalapa, Mexico, January 2005. Memoirs of the New York Botanical Garden 97: 143-175.
- Chen, J. and Stevenson, D.W. 2006. Flora of China. Available at: <a href="www.efloras.org">www.efloras.org</a>.
- Whitelock, L.M. 2002. <i>The Cycads</i>. Timber Press, Portland, Oregon.
Évaluateurs & contributeurs (3)Personnes ayant contribué à l'évaluation IUCNExpert
assessor
Liu, J., Lindstrom, A. & Gong, X.
contributor
Bösenberg, J.D.
evaluator
Bösenberg, J.D.
Liu, J., Lindstrom, A. & Gong, X. 2023. Cycas hongheensis. The IUCN Red List of Threatened Species 2023: e.T42040A68902633. 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
- Cycas pectinata f. hongheensis(S.Y.Yang & S.L.Yang) Z.T.Guan
Sources : Catalogue of Life Cross-References (synonymes) · TAXREF v18 INPN/MNHN (commentaires FR).