Welcome to Bulletin of Botanical Research! Today is Share:

Bulletin of Botanical Research ›› 2021, Vol. 41 ›› Issue (1): 12-25.doi: 10.7525/j.issn.1673-5102.2021.01.003

Previous Articles     Next Articles

Pollinia Morphology of 14 Species in Dendrobium(Orchidaceae) and Taxonomic Significance

Yan-Ping WANG1,2, Lu LI1(), Chen-Xuan YANG1,3, Yan LUO3, Qing-Qing LI2   

  1. 1.Department of Biodiversity Conservation,Southwest Forestry University,Kunming 650224
    2.School of Life Science,Southwest Forestry University Kunming 650224
    3.Department of Horticulture and Gardening,Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Mengla 666303
  • Received:2020-02-28 Online:2021-01-20 Published:2021-01-05
  • Contact: Lu LI E-mail:lilusaraca@foxmail.com
  • About author:WANG Yan-Ping(1993—),female,postgraduate student,majoring in morphology and classification of Orchidaceae.
  • Supported by:
    National Nature Science Foundation of China(32060049);Fourth National Survey on Chinese Material Medical Resources(GZY-KJS-2018-004)


The morphology and exine sculpture of pollinia in 14 species of Dendrobium Sw.(Orchidaceae) were investigated using stereoscope and scanning electron microscope in order to provide evidence for classification and systematic evolution of this genus. Under stereomicroscope, the anther is composed of 4 clavated pollinia with a golden, oily, waxy surface and a hard texture in 14 Dendrobium species. According to the general appearance, Dendrobium pollinia observed can be divided into 3 shapes(heart-shaped, nearly heart-shaped and long heart-shaped) and 4 types(extremely small pollinia, small pollinia, large pollinia and oversize pollinia). Based on the curvature of the boundary contour of a pollinium, it can be divided into four types(crescent-like, bow-like, stick-like and rice grain-like). There are 5 kinds of exine sculptures(psilate; psilate with threads; psilate-uneven,coarse reticulate and rugulate) under scanning electron microscope, as well as two types of crystals observed on the surface of pollinia in D.wislsonii Rolfe and D.thyrsiflorum Rchb. The morphology and exine sculpture of pollinia were distinguished in different species of Dendrobium, which is of some significance to its taxonomic clarification.

Key words: Orchidaceae, Dendrobium, pollinia morphology, exine sculpture, taxonomy

CLC Number: