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Bulletin of Botanical Research ›› 2021, Vol. 41 ›› Issue (2): 168-173.doi: 10.7525/j.issn.1673-5102.2021.02.003

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Phenological Observation of the Extremely Small Population Plant Styrax zhejiangensis

Guo-Lin FU1, Ting-Ting LI2, Ye-Hua ZHANG1, Xiang-Ying WEN3, Xue-Chu MA1, Chu-Ping WU2()   

  1. 1.Forest Farm of Jiande City,Jiande 311600
    2.Zhejiang Academy of Forestry,Hangzhou 310023
    3.South China Botanical Garden,CAS,Tianhe 510650
  • Received:2020-03-05 Online:2021-03-20 Published:2021-01-05
  • Contact: Chu-Ping WU E-mail:wcp1117@hotmail.com
  • About author:FU Guo-Lin(1975—),male,bachelor degree,engaged in the forest silviculture.
  • Supported by:
    Basic Public Welfare Research Program of Zhejiang Province(LGN18C030004);Major Collaborative Project between Zhejiang Province and the Chinese Academy of Forestry(2019SY08)


Styrax zhejiangensis was a species with extremely small population, and endemic in Taohuawu, Longjiang, Jiande Forest Farm, Zhejiang Province. To clarify the reason this species endangered, phenology of S.zhejiangensis was observed, including its flowering and seed setting pattern, as well as the biological characteristics of seeds. The results showed that flowers and leaves shared the same proliferation period. The characteristics of flower organs and pollen were similar to those plants of the same genus, and the seed setting rate was 21%-32%. Seeds had high morphological variations, and their insufficient plumpness and poor water permeability caused by dense and hard seed coat may affect seed germination. Abundant rainfall, and temperature differences between day and night, were two major drivers that would aggravate the falling of flowers and fruits. More attention should be paid to their seeds, flowers and fruits if we aim to conserve this endangered species.

Key words: Styrax zhejiangensis, extremely small population of wild plant, phenological observation

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