Zhao Dongwei, Zhang Guiliang, Yang Shixiong
Department of Forestry, College of Forestry, Central South University of Forestry and Technology, Changsha, Hunan 410004, China Central South University of Forestry and Technology Changsha China.
Hekou Administration Branch of Dawei Mountain National Nature Reserve, Hekou, Yunnan 661399, China Hekou Administration Branch of Dawei Mountain National Nature Reserve Hekou China.
PhytoKeys. 2025 May 29;256:185-195. doi: 10.3897/phytokeys.256.149481. eCollection 2025.
harbors unique diversity along Sino-Vietnamese border. Some species of them are under threat due to human activity. , a native of Hekou, Yunnan, China, was once considered extinct as the previously known "last living tree" died in 2024. Fortunately, 11 in-situ and 32 ex-situ trees have been protected and propagated by the staff of Hekou Administration Branch of Dawei Mountain National Nature Reserve in Yunnan with their great unpublicized efforts. Molecular phylogenetic analysis suggests that is nested in the main clade CI of and forms a clade with , and , which are generally distributed in Vietnam. Morphological characters of the capsule and seed of are supplementally described. The leaves of contain 1.18 mg/g theobromine, which disagrees with the previous chemotaxonomic claim. Though the economic and ecological values are little known for , the species should be conserved and propagated effectively and promptly to prevent extinction.
中越边境地区拥有独特的生物多样性。其中一些物种由于人类活动而受到威胁。中国云南河口的 ，曾因已知的“最后一棵活树”于2024年死亡而一度被认为灭绝。幸运的是，云南大围山国家级自然保护区河口管理分局的工作人员默默付出巨大努力，对11株原地树木和32株迁地树木进行了保护和繁育。分子系统发育分析表明， 嵌套在 的主要分支CI中，并与通常分布在越南的 、 和 形成一个分支。补充描述了 的蒴果和种子的形态特征。 的叶子含有1.18毫克/克的可可碱，这与之前的化学分类学观点不一致。尽管 鲜为人知其经济和生态价值，但该物种应得到有效及时的保护和繁育，以防灭绝。
