Plant Diversity ›› 2012, Vol. 34 ›› Issue (4): 326-.DOI: 10.3724/SP.J.1143.2012.12006

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Pollen Morphology of Tibetia (Fabaceae) from the Hengduan Mountains, with Emphasis on the Taxonomical Status of Tibetia liangshanensis

 谢艳萍1、2, 孙航1, 聂泽龙1   

  1. 1 Key Laboratory of Biodiversity and Biogeography, Kunming Institute of Botany, Chinese Academy of Sciences,
    Kunming 650201, China; 2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2012-01-12 Online:2012-08-25 Published:2012-05-17
  • Supported by:

    国家自然科学NSFC—云南联合基金项目 (U1136601),美国MacArthur基金项目 (02-73933)


To clarify the pollen morphology and the taxonomical status of Tibetia liangshanensis in Tibetia, a small genus endemic in the Hengduan Mountains of SW China, we reexamined the pollen morphology of all species of Tibetia (except for a plausible species, T.forrestii) using SEM in this study. The pollen data for T.liangshanensis was corrected and the others (T.himalaica, T.yunnanensis, T.tongolensis and T.yadongensis) were confirmed. The shapes of Tibetia’s pollen grains are spheroidal or subprolate with perforate surfaces. Two types of pollen grains were found (i.e., 3-colporate and 4-colporate), corresponding to two sections recognized in this genus. The results showed that the pollen grain of T.liangshanensis is 4colporate. However, it was reported as 3colporate pollens and treated as a synonym of T.forrestii. Morphologically, the two species are very distinct with T.liangshanensis in having leaflets 13-17, stipules free and corolla purple, while T.forrestii with leaflets 7-9, stipules connate at base and corolla yellow. The epidermal characters of the two species are also distinguished under SEM. Therefore, we suggested that T.liangshanensis should regain its taxonomical status at the species level.

Key words: Pollen morphology, Tibetia, Tibetia liangshanensis, 3-colporate, 4-colporate

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