Red list assessment of Philippine ironwood (Xanthostemon spp. Myrtaceae)
2020
Malabrigo, P.L. Jr | Gibe, R.C.
The Philippines has 5 unique and endemic species of the genus Xanthostemon, collectively known as ironwood trees, listed in the Philippine Red List as either critically endangered or endangered. Exploration revealed several undocumented populations of ironwood species. Results of the inventory also showed extreme abundance and dominance of the species in their area of occurrence. Following the categories and criteria set by the International Union for Conservation of Nature (IUCN), X. bracteatus, X. philippinensis and X. verdugonianus were assessed as vulnerable (VU)), X. fruticosus was categorized as endangered (EN) while X. speciosus was assessed as near threatened (NT). In addition, the paper presents an updated species profile for each ironwood species. The enormous number of new populations recorded revealed the lack of botanical explorations done in the past. Assessment of conservation status necessitates purposive survey of the species being assessed since most criteria cannot be reliably obtained unless plant inventory is conducted.
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