Chromosome numbers in Compositae. XVIII.

@article{Carr1999ChromosomeNI,
  title={Chromosome numbers in Compositae. XVIII.},
  author={Gerald D. Carr and Robert M. King and ANNE M. Powell and Harold Ernest Robinson},
  journal={American journal of botany},
  year={1999},
  volume={86 7},
  pages={
          1003-13
        }
}
Chromosome numbers and other cytogenetic data were determined from microsporocytes in 316 collections including 13 tribes of Compositae, mostly from Africa, Australia, Mexico, Central America, and South America. First reports are provided for 66 species and the genera Cassinia (2n ≈ 14(II)), Feldstonia (2n = 11(II)), Gochnatia (2n ≈ 23(II)), and Pseudoconyza (n = 10). In addition, new chromosome numbers are established at the generic level in Acourtia, Calea, Craspedia, Gnaphalium, Helipterum… 
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Cytogenetic variations in eight species of Saussurea DC. (Asteraceae, Cardueae) from Northwest Himalaya
TLDR
The meiotic studies on different populations of Saussurea reveal a substantial amount of meiotic abnormalities in the form of chromosome stickiness, un-oriented bivalents, cytomixis, laggards, etc. leading to the meiocytes with less (aneuploidy) or more (polyploidsy) chromosome numbers.
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