Abstract
Based on morphological comparisons of specimens and observations of living plants in the field we conclude that the key characters as the color of setae on the abaxial leaf sides and pedicles, and the number of ray florets which Jeffrey and Chen used to distinguish Synotis ionodasys from S. cappa are variable and not reliable, and all the characters of the former species (ferrugineous tomentum, 14–20 ray florets) are not distinct and fall within the variation range of the latter, thus making S. ionodasys conspecific with S. cappa.
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