Complex sentence: Other "Prunus" species may act as symptomless or tolerant carriers of the disease; especially cultivars of Japanese flowering cherries ("Prunus serrulata") have been implicated as symptomless carriers.
Split into simpler sentences: Other "Prunus" species may act as symptomless or tolerant carriers of the disease. Especially cultivars of Japanese flowering cherries ("Prunus serrulata") have been implicated as symptomless carriers.