taxonID	type	description	language	source
03FFA255FFBDFF8EFF09FF6BFD1EC8F9.taxon	description	Fig. 1 MycoBank 855497.	en	Zhang, Haiyan, Xie, Feng, Shu, Qiwen, Luan, Zhiyuan, Li, Dong, Luan, Fenggang (2025): Erysiphe jiangxiensis sp. nov. associated with powdery mildew on Castanopsis sclerophylla in Jiangxi, China. Phytotaxa 702 (1): 102-108, DOI: 10.11646/phytotaxa.702.1.8, URL: https://doi.org/10.11646/phytotaxa.702.1.8
03FFA255FFBDFF8EFF09FF6BFD1EC8F9.taxon	diagnosis	Differs from Erysiphe kissiana by having smaller chasmothecia, fewer asci and ascospores, and occurring on Castanopsis sclerophylla.	en	Zhang, Haiyan, Xie, Feng, Shu, Qiwen, Luan, Zhiyuan, Li, Dong, Luan, Fenggang (2025): Erysiphe jiangxiensis sp. nov. associated with powdery mildew on Castanopsis sclerophylla in Jiangxi, China. Phytotaxa 702 (1): 102-108, DOI: 10.11646/phytotaxa.702.1.8, URL: https://doi.org/10.11646/phytotaxa.702.1.8
03FFA255FFBDFF8EFF09FF6BFD1EC8F9.taxon	etymology	Etymology: — jiangxiensis, a fungus found in Jiangxi Province, China.	en	Zhang, Haiyan, Xie, Feng, Shu, Qiwen, Luan, Zhiyuan, Li, Dong, Luan, Fenggang (2025): Erysiphe jiangxiensis sp. nov. associated with powdery mildew on Castanopsis sclerophylla in Jiangxi, China. Phytotaxa 702 (1): 102-108, DOI: 10.11646/phytotaxa.702.1.8, URL: https://doi.org/10.11646/phytotaxa.702.1.8
03FFA255FFBDFF8EFF09FF6BFD1EC8F9.taxon	materials_examined	Type: — CHINA. Jiangxi Province: Nanchang, Jiangxi Agricultural University, on Castanopsis sclerophylla (Lindl.) Schott. (Fagaceae), October 8, 2020, F. G. Luan, D. Li & C. H. Wei (JXAU 20201008); ex-type rDNA sequences, OL 782609 (ITS).	en	Zhang, Haiyan, Xie, Feng, Shu, Qiwen, Luan, Zhiyuan, Li, Dong, Luan, Fenggang (2025): Erysiphe jiangxiensis sp. nov. associated with powdery mildew on Castanopsis sclerophylla in Jiangxi, China. Phytotaxa 702 (1): 102-108, DOI: 10.11646/phytotaxa.702.1.8, URL: https://doi.org/10.11646/phytotaxa.702.1.8
03FFA255FFBDFF8EFF09FF6BFD1EC8F9.taxon	description	Colonies epiphyllous, initially circular with radial margins in the early stage, then merging. Chasmothecial appendages 7 – 22.5 µm long (mean 12.25 µm, n = 20), hyaline, radiating, stiff, straight to curved. Chasmothecia scattered, 45 – 67.5 µm (mean 55.5 µm, n = 26) in diameter, dark brown, mostly globose (Fig. 1 D, E) with 2 – 4 asci. Asci ellipsoid to spherical, 45 – 65 × 32.5 – 50 µm with 4 – 7 ascospores per ascus. Ascospores subcylindrical, 17.5 – 27.5 × 10 – 13.5 µm (mean 22.1 × 11.8 μm, n = 33) (Fig. 1 F). Conidia hyaline, cylindrical, rarely ovoid, solitary, occasionally 3 to 5 remaining in a short false chain, 5.0 – 12.5 × 3.75 – 7.5 μm, length / width ratio 1.0 – 2.5, averaging 1.4 (Fig. 1 G).	en	Zhang, Haiyan, Xie, Feng, Shu, Qiwen, Luan, Zhiyuan, Li, Dong, Luan, Fenggang (2025): Erysiphe jiangxiensis sp. nov. associated with powdery mildew on Castanopsis sclerophylla in Jiangxi, China. Phytotaxa 702 (1): 102-108, DOI: 10.11646/phytotaxa.702.1.8, URL: https://doi.org/10.11646/phytotaxa.702.1.8
03FFA255FFBDFF8EFF09FF6BFD1EC8F9.taxon	distribution	Distribution: — on C. sclerophylla, China.	en	Zhang, Haiyan, Xie, Feng, Shu, Qiwen, Luan, Zhiyuan, Li, Dong, Luan, Fenggang (2025): Erysiphe jiangxiensis sp. nov. associated with powdery mildew on Castanopsis sclerophylla in Jiangxi, China. Phytotaxa 702 (1): 102-108, DOI: 10.11646/phytotaxa.702.1.8, URL: https://doi.org/10.11646/phytotaxa.702.1.8
03FFA255FFBDFF8EFF09FF6BFD1EC8F9.taxon	discussion	Phylogenetic analysis The internal transcribed spacer (ITS) region sequence, measuring 639 bp, was obtained and deposited in GenBank under accession number OL 782609. BLASTn analysis revealed this sequence to be 99.19 % similar to the ex-types of E. kissiana. The dataset of 28 taxa sequences after alignment provided 1559 characters where 518 were constant and 246 were parsimony-informative. The sequence of Bulbomicroidium bauhiniicola MUMH 6844 was used as the outgroup. In Figure 2, bootstrap support values (≥ 50 %) are shown on the respective branches for the maximum likelihood analysis, followed by posterior probabilities greater than 0.5 for the Bayesian analysis. The phylogenetic analysis showed that the ITS sequence of JXAU 20201008, obtained from powdery mildew on C. sclerophylla in China, did not have a good clustering relationship with the E. kissiana clade, with relative low reliability (ML = 66 %, BI = 0.53). Field inoculation and pathogenicity assay In the field inoculation studies, visual powdery mildew symptoms started to appear on all inoculated leaves after 5 days (Fig. 1 C), progressing to cover almost all the leaves within a 10 - day period after inoculation. Non-inoculated control plants remained symptomless. The same results were obtained in the repeated experiment. The ITS region of powdery mildew from mycelium after inoculation was successfully amplified with PCR and sequenced. This ITS sequence was identical to the sequence of JXAU 20201008.	en	Zhang, Haiyan, Xie, Feng, Shu, Qiwen, Luan, Zhiyuan, Li, Dong, Luan, Fenggang (2025): Erysiphe jiangxiensis sp. nov. associated with powdery mildew on Castanopsis sclerophylla in Jiangxi, China. Phytotaxa 702 (1): 102-108, DOI: 10.11646/phytotaxa.702.1.8, URL: https://doi.org/10.11646/phytotaxa.702.1.8
