Engler, Bot. Jahrb. 29: 556. 1900; Dunn in Notes Bot. Gard. Edinburgh 6: 188. 1915; Kudo in Mem. Fac. Sci. Agr. Taihoku Univ. 2: 185-1929; C. Y. Wu in Act. Phytotax. Sin. 8 (1) : 46. 1959; Hsuan in ibid. 10 (1) : 54. 1965

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花期时花萼钟形,长约8毫米,直径约3.5毫米,近膜质,淡绿色,齿5,近相等,三角状钻形;果期时花萼增大,干膜质,齿先端呈挂钩状弯曲

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