Blume (Lauraceae) is a narrow endemic tree species found only in Sawarna Village of Lebak Regency, Banten Province, Indonesia. Due to its narrow distribution, small population size, and threat from habitat conversion, the species is classified as Critically Endangered (CR). In the present study, we report the new distributional records of on Nusakambangan Island of Central Java Province c. 300 km southeast of the previous location, alongside population data and characteristics of the habitat of the species in the new locations. A total of 31 individuals were observed from two locations, with the majority (87 %) being immature. Only four individuals are deemed mature, with a diameter at breast height ranging from 17 to 28 cm. Based on our findings, the species is still qualified for CR status under criteria CR C2a(i),D. We observed that in the locations, habitat conversion into agricultural lands is the main threat to the species. To enhance the conservation of the species, a propagation trial had been conducted and the results showed that sand media could be used to propagate the species from shoot cuttings. Furthermore, by employing species distribution models, we provided the potential distribution map of the species to assist future population surveys and species recovery initiatives.

中文翻译：

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极危特有特有树种Actinodaphne quercina Blume（樟科）的新分布记录、保护状况和繁殖

Blume（樟科）是一种狭窄的特有树种，仅发现于印度尼西亚万丹省勒巴克县的萨瓦纳村。由于其分布范围狭窄、种群规模较小以及栖息地转变的威胁，该物种被列为极度濒危（CR）物种。在本研究中，我们报告了中爪哇省努沙坎班甘岛的新分布记录。前地点东南 300 公里处，以及新地点的种群数据和物种栖息地特征。从两个地点总共观察到 31 只个体，其中大多数 (87%) 尚未成熟。只有四个个体被认为是成熟的，胸径在 17 至 28 厘米之间。根据我们的研究结果，该物种仍符合 CR C2a(i),D 标准下的 CR 状态。我们观察到，在这些地点，栖息地转变为农田是对该物种的主要威胁。为了加强该物种的保护，进行了繁殖试验，结果表明可以使用沙介质通过枝条繁殖该物种。此外，通过采用物种分布模型，我们提供了物种的潜在分布图，以协助未来的种群调查和物种恢复计划。