Abstract: Cytological characters of four species in Syncalathium (Asteraceae: Lactuceae), a small genus with about six species endemic to alpine scree of the Sino-Himalayan region, are surveyed in this report. Three species (S. pilosum, S. chrysocephalum, and S. disciforme) are examined for the first time. Combined with our previous counts, five species have been cytologically investigated from the genus and the results indicated that all species are diploid with the basic somatic chromosome number of x=8. The karyotype asymmetry of S. souliei is 2A, distinct from the other four species of 1A, and the remaining species are divided into two subgroups with different karyotypes, consistent with their morphological features. The significance of cytological evolution of Syncalathium is briefly discussed.

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