A NEW SPECIES OF UROMYCES ATTACKING HELLEBORUS THIBETANUS
侵染铁筷子的单胞锈菌一新种

A rust species seldom found on Helleborus of Ranunculaceae was described as new. The rust is characterized by its colourless and echinulate urediniospores with indistinct germ pores and verrucose teliospores with a colourless, low and small papilla over the germ pore. Its systematic relationships are discussed and its distinguishing microscopic features are illustrated. Judging by the distribution of the host, the rust is inferred to be indigenous in the central part of China.