Abstract
We demonstrate that the controversial Parasenecio delphiniiphyllus (known from northeastern Yunnan and western Guizhou, China) is not conspecific with P. delphiniifolius (Japan) since these two species are readily distinguishable by inflorescence structure and involucre length, as well as in the length of anther tails and anther collars. The two species also have different chromosome numbers, 2n = 60 in P. delphiniiphyllus and 2n = 52 in P. delphiniifolius. Evidence from gross morphology, floral micro-morphology, cytology and geographical distribution strongly supports the independent specific status of P. delphiniiphyllus.
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