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Bulletin of Botanical Research ›› 2017, Vol. 37 ›› Issue (4): 481-491.doi: 10.7525/j.issn.1673-5102.2017.04.001

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Leaf Venation and its Taxonomical Significance in Sect. Denticulatae(Salix) of China

MENG Xiang-Yu, YU Hui-Ying, ZHANG Zhi-Xiang   

  1. College of Nature Conservation, Beijing Forestry University, Beijing 100083
  • Received:2017-03-09 Online:2017-07-15 Published:2017-07-22
  • Supported by:
    Nature Science Foundation of China(J1310002,31110103911);Science and Technology Basic Work(2013FY112100)

Abstract: Comparative observation on leaf venation of 17 species and 1 variety from Salix Sect. Denticulatae were made performed in order to provide new morphological evidence for the classification of Salix by the means of this section. The results showed that the venation of all taxa was found to be craspedodromously pinnate. Most species have intersecondary veins. Tertiary and higher level veins were divided into three types. The areoles are regular or irregular. Veinlets are branched or absent. The results also indicated that the areoles and veinlets were stable characters which showed significant differences bwteeen species. Based on the UPGMA analysis for venation pattern of Sect. Denticulatae C.K. Schneid., S.praticola Hand.-Mazz. ex Enander types and S.delavayana Hand.-Mazz. types were founed. Leaf venation characters provides new characters. They could be used, therefore, as important diagnostic features for identifying these species.

Key words: Salix, Sect.Denticulatae, leaf venation, taxonomic significance

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