Achene Morphological Features of Saussurea subg. Eriocoryne (Asteraceae) and Its Taxonomical Significance*

doi:10.7677/ynzwyj201313079

Abstract

Abstract:

The achene morphological features of 28 species of Saussurea subg. Eriocoryne and some close related taxa were observed under scanning electronic microscope. The shape, size, colour and ornamentation of the achenes of Saussurea subg. Eriocoryne are stable at the species level. The apex of the pericarp of S.stella and S.thoroldii are elongated into an irregularly dentate crown, which made them different from the other species in Saussurea subg. Eriocoryne. The ornamentation of the surface sculpture of Saussurea subg. Eriocoryne is striate, and the striate ornamentation can be divided into 3 subtypes: no diaphragm, diaphragmatic, transitional between diaphragmatic and no diaphragm, which is associated with the sectional division in Saussurea subg. Eriocoryne. The subtypes of the ormantation also revealed some morphological evolutionary trends at the section level. The ornamentation of the surface sculpture of the rest species observed are striate, reticulate, areolate and compound. The striate surface sculpture of the species observed in Serratula, Arctium and Carduus showed the close relationship between them and Saussurea subg. Eriocoryne.

Key words: Eriocoryne, Achene morphology, Taxonomic implications

CLC Number:

Q 944
Q 949

XU Bing-Jiang-, ZHENG Chao-Han-, TONG Yi-Hua-, ZHOU Wei-, JIA Nian-He. Achene Morphological Features of Saussurea subg. Eriocoryne (Asteraceae) and Its Taxonomical Significance*[J]. Plant Diversity, 2013, 35(3): 253-264.

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