Caryota mitis L. (fishtail palm) is a popular landscape and outdoor plant in tropical regions as well as in China. In June 2018, leaf spot symptoms (up to 60% plants were infected) were observed on C. mitis in Fujian Agriculture Forestry University (26°5′16″N, 119°14′6″E), and different parks in Fuzhou of China. Initial symptoms of infected leaves were pale brown, irregular small spots that gradually turned to dark brown, coalescing to form larger irregular necrotic patches and leading to leaf death. For isolation, infected leaves were surface-sterilized with 75% alcohol, rinsed 2-3 times in sterile distilled water, 0.5 cm2 pieces were cut from necrotic leaf areas, inoculated onto 2% potato dextrose agar (PDA) and incubated at 25°C for three days. Fifteen cultures of a filamentous fungus were consistently isolated from infected leaves samples from twenty C. mitis plants. Colonies on PDA at 25°C, were initially white with abundant aerial mycelium which turned fluffy and dark olivaceous after 4 days. The re...