identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
CECF8F030AD5568BAE7E9110C260BDB5.text	CECF8F030AD5568BAE7E9110C260BDB5.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Erysiphe rosae (Golovin & Gamalitsk.) D. - N. Jin & S. - Y. Liu 2026	<div><p>Erysiphe rosae (Golovin &amp; Gamalitsk.) U. Braun &amp; S. Takam., Schlechtendalia 4: 4, 2000</p><p>Fig. 4</p><p>≡ Medusosphaera rosae Golovin &amp; Gamalitsk., Bot. Mater. Otd. Sporov. Rast. Bot. Inst. Komarova Akad. Nauk S. S. S. R. 15: 92, 1962.</p><p>Type.</p><p>Holotype: Kyrgyzstan • Tjan-Shan, Kavak-Tau, Tabylgyty, on Rosa albertii, 14 Sep. 1959, Gamalitskaya (LE 193792) . Reference collection: China, Xinjiang, Urumqi, on Rosa albertii, 3 Aug. 2009, Z. Y. Zhao &amp; B. Xu (HMAS 242383). Reference sequences: PX 506005 (ITS), PX 506007 (28 S), PX 570626 (IGS) .</p><p>Specimens examined.</p><p>• HMJAU -PM 92697, HMAS 36517, HMAS 36518, HMAS 44287, and HMAS 138804. Detailed specimen information is presented in Suppl. material 1.</p><p>Morphological description.</p><p>Braun and Cook (2012: 501–502).</p><p>Host range and distribution.</p><p>on Rosa ( albertii, amblyotis, davurica, omeiensis, webbiana), Rosaceae; Asia (China, India, Kyrgyzstan, Russia, Far East).</p><p>Notes.</p><p>Erysiphe rosae is characterized by sinuous long appendages and bristle-like short appendages. This taxon has been controversially treated at the generic level. It was first introduced as the type species of the genus Medusosphaera and later transferred to Erysiphe because the morphology of the chasmothecial appendages was no longer recognized as suitable for differentiation at the generic level (Golovin and Gamalitskaya 1962; Braun and Takamatsu 2000). The correct allocation of M. rosae to Erysiphe was confirmed in the present study based on lobed hyphal appressoria and conidiophores with singly formed conidia (Fig. 4), as well as sequences successfully retrieved from specimens of this species, which form a highly supported species clade within Erysiphe (Fig. 1). It should be noted that the sequences of the three examined specimens clustered together according to their host plants, which indicates previously unrecognized diversity within E. rosae, possibly suggesting cryptic formae, a taxonomic unit recently reapplied in Erysiphaceae (Bradshaw et al. 2025 c; Feng et al. 2025 a). However, due to the limited number of specimens available, it was impossible to obtain additional molecular data or to observe potential morphological differences. Therefore, following the species concept proposed by Bradshaw et al. (2022), we provisionally treated these specimens as E. rosae s. lat. Since the holotype of this species from Kyrgyzstan has not yet been sequenced, the Chinese specimen HMAS 242383 on the type host Rosa albertii is selected as the reference collection with reference sequences for the interim.</p></div>	https://treatment.plazi.org/id/CECF8F030AD5568BAE7E9110C260BDB5	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Jin, Dan-Ni;Wang, Shuang-Bao;Guan, Le-Ping;Wu, Xue-Lian;Feng, Jing;Liu, Li;Bradshaw, Michael;Braun, Uwe;Yang, Jing-Han;Yu, Shou-Rong;Li, Yu;Liu, Shu-Yan	Jin, Dan-Ni, Wang, Shuang-Bao, Guan, Le-Ping, Wu, Xue-Lian, Feng, Jing, Liu, Li, Bradshaw, Michael, Braun, Uwe, Yang, Jing-Han, Yu, Shou-Rong, Li, Yu, Liu, Shu-Yan (2026): Revision of powdery mildews (Ascomycota, Erysiphaceae) on Rosa in China: unexpected taxonomic complexity with phytopathological implications. IMA Fungus 17: e 184484, DOI: 10.3897/imafungus.17.184484
A58C0F16B9A659658855B877253C0723.text	A58C0F16B9A659658855B877253C0723.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Erysiphe simulans (E. S. Salmon) U. Braun & S. Takam.	<div><p>Erysiphe simulans (E. S. Salmon) U. Braun &amp; S. Takam., Schlechtendalia 4: 23, 2000</p><p>Figs 5, 6</p><p>≡ Uncinula simulans E. S. Salmon, Ann. Mycol. 6: 2, 1908.</p><p>≡ Uncinuliella simulans (E. S. Salmon) R. Y. Zheng &amp; G. Q. Chen, Acta Microbiol. Sin. 19 (3): 286, 1979.</p><p>= Uncinuliella simulans var. rosae-rubi R. Y. Zheng &amp; G. Q. Chen, Acta Microbiol. Sin. 19 (3): 288, 1979.</p><p>≡ Erysiphe simulans var. rosae-rubi (R. Y. Zheng &amp; G. Q. Chen) U. Braun &amp; S. Takam., Schlechtendalia 4: 23, 2000.</p><p>= Uncinuliella simulans var. tandae U. Braun, Mycotaxon 22 (1): 92, 1985.</p><p>≡ Erysiphe simulans var. tandae (U. Braun) U. Braun &amp; S. Takam., Schlechtendalia 4: 24, 2000.</p><p>Type.</p><p>Lectotype (designated by Braun 1987): Japan • Morioka, on Rosa multiflora, 21 Oct. 1906, Sawada (TNS-F-214613). Reference sequences (designated by Bradshaw et al. 2023): AB 015926 (ITS), AB 022395 (28 S) [in Takamatsu et al. (1999) and Mori et al. (2000)] .</p><p>Specimens examined.</p><p>• A total of 13 specimens were examined, including HMJAU -PM 92698 to HMJAU -PM 92708, and two specimens from the Herbarium Mycologicum Academiae Sinicae, HMAS 11418 and HMAS 13631. Detailed specimen information is presented in Suppl. material 1.</p><p>Morphological description.</p><p>Braun and Cook (2012: 586).</p><p>Host range and distribution.</p><p>on Rosa ( multiflora, odorata, rubus), Rosaceae; Asia (China, Japan, Korea).</p><p>Notes.</p><p>Bradshaw et al. (2023) found that the sequences of E. simulans var. rosae-rubi and E. simulans var. tandae grouped together with high bootstrap values. The authors reported that the morphological differences were only gradual or had overlapping quantitative features and, as such, concluded that varieties under E. simulans should be discarded. The morphology of a reference specimen of E. simulans from Japan (HMAS 13631) and the holotype of E. simulans var. rosae-rubi from China (HMAS 11418) were re-examined in this study (Figs 5, 6). We confirmed that the two are highly similar in all characteristics. The differences in the number of appendages described by Zheng and Chen (1979) are also indistinct and overlap with each other. Although we failed to amplify sequences from those two specimens, other sequences of E. simulans were obtained from eleven newly collected specimens. The present phylogenetic analysis showed that there are minimal genetic differences within this species. Therefore, it is reasonable and justified to discard these varieties of E. simulans .</p></div>	https://treatment.plazi.org/id/A58C0F16B9A659658855B877253C0723	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Jin, Dan-Ni;Wang, Shuang-Bao;Guan, Le-Ping;Wu, Xue-Lian;Feng, Jing;Liu, Li;Bradshaw, Michael;Braun, Uwe;Yang, Jing-Han;Yu, Shou-Rong;Li, Yu;Liu, Shu-Yan	Jin, Dan-Ni, Wang, Shuang-Bao, Guan, Le-Ping, Wu, Xue-Lian, Feng, Jing, Liu, Li, Bradshaw, Michael, Braun, Uwe, Yang, Jing-Han, Yu, Shou-Rong, Li, Yu, Liu, Shu-Yan (2026): Revision of powdery mildews (Ascomycota, Erysiphaceae) on Rosa in China: unexpected taxonomic complexity with phytopathological implications. IMA Fungus 17: e 184484, DOI: 10.3897/imafungus.17.184484
17EF615C56625F30A2A42B9457C570C7.text	17EF615C56625F30A2A42B9457C570C7.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Podosphaera pannosa (Wallr.) de Bary	<div><p>Podosphaera pannosa (Wallr.) de Bary, Abh. Senkenb. Naturf. Ges. 7: 408, 1870. s. str. [emend]</p><p>Fig. 7</p><p>≡ Alphitomorpha pannosa Wallr., Verh. Ges. Naturf. Freunde Berlin 1: 43, 1819.</p><p>≡ Erysiphe pannosa (Wallr.) Link (as “ Erysibe ”), in Willdenow, Sp. pl., Edn 4, 6 (1): 104, 1824, nom. sanct. (Fr., Syst mycol. 3 (1): 236, 1829).</p><p>≡ Sphaerotheca pannosa (Wallr.) Lév., Ann. Sci. Nat., Bot., 3 Sér., 15: 138, 1851.</p><p>Type.</p><p>Neotype (designated here, MBT 10030088): Germany • Lower Saxony, Hannover-Ahlem, experimental section “ cemetery planting, ” on Rosa sp. cult. (hybrid), 27 Sep. 2018, P. Houska (NCSLG 24638) . Isoneotype: HAL 3600 F. Ex-neotype sequences: PV 581762 (ITS + 28 S), PV 584310 (IGS), PV 584347 (TUB) .</p><p>Description.</p><p>Mycelium on leaves, amphigenous, also on stems and petals, persistent, infected shoots often curled and distorted, forming irregular patches or effuse; primary hyphae hyaline, thin-walled, straight or sometimes flexuous, (2.5 –) 3–5.5 μm wide; secondary hyphae hyaline, thick-walled, 4–6 μm wide, colonies on twigs only developed in the later stages of the disease; hyphal appressoria indistinct to nipple-shaped, solitary or side by side; conidiophores arising from the upper surface of mother cells, erect, (52 –) 60–97 (– 99) × (6.5 –) 7.5–9.5 μm, foot cells straight, cylindrical, 33–59 × 7–9.5 μm, followed by (1 –) 2–3 shorter cells, forming catenescent conidia; conidia variable, primary conidia obovoid, secondary conidia doliiform to cylindrical, 20–26 × 11.5–15 μm, length / width ratio 1.5–2.1; germ tubes almost terminal. Chasmothecia gregarious, subglobose to globose, immersed in the secondary mycelial patches, mostly on stems, but also produced on leaves when the disease is severe, (74 –) 88–113 μm diam.; peridium cells round to irregularly polygonal, 4.0–16 μm diam.; appendages few, in the lower half of chasmothecia, mycelioid, short, usually shorter than chasmothecial diam., rarely up to 1.5 times diam., occasionally branching, brownish at the basal part or brown throughout, septate, thin-walled, smooth, coarse; ascus ovoid to fusiform, colorless, thick-walled, sessile or almost sessile, 87–140 × 63–84 μm, length / width ratio 1.2–1.9, terminal oculus obvious, large, 13.5–21 μm, 8 - spored; ascospores ellipsoid to round, colorless, (16.5 –) 18–25 × 12.5–17.5 μm, length / width ratio 1.1–1.9.</p><p>Additional specimens examined.</p><p>• A total of 51 specimens were examined, including 50 specimens with voucher numbers HMJAU -PM 92709 to HMJAU -PM 92758 and one specimen of HMAS 38723. Detailed specimen information is presented in Suppl. material 1.</p><p>Host range and distribution.</p><p>(phylogenetically confirmed hosts and distribution). Rosa ( canina, chinensis, × damascena, foetida, gallica, laxa, majalis, multiflora, albertiirubiginosa, rugosa, xanthina), Prunus ( armeniaca, cerasus, laurocerasus, persica, granatum), Rosaceae; Catharanthus roseus, Apocynaceae; Citrus reticulata × C. sinensis, Rutaceae; Corymbia citriodora, Eucalyptus ( benthamii, grandis, sp.), Myrtaceae; and Forsythia × intermedia, Oleaceae . Asia (China, India, Iraq, Israel, Japan, Pakistan, South Korea, Vietnam), Europe (Belgium, France, Germany, Netherlands, Serbia, Spain, United Kingdom), North America (Mexico, United States), Oceania (Australia, New Zealand), and South America (Argentina, Brazil, Chile, Peru, Uruguay).</p><p>Notes.</p><p>Podosphaera pannosa is the most widely distributed species on Rosa spp. Alphitomorpha pannosa, the basionym, was described from Germany, but type material is not preserved (Braun and Cook 2012). Therefore, a German specimen is designated as the neotype with ex-neotype ITS, 28 S, IGS, and TUB sequences. Based on the current morphological and phylogenetic results, it is clear that P. rosae is genetically distinguishable from P. pannosa . The records of P. pannosa on R. rugosa (HMAS 01630, 14132) in Zheng and Yu (1987) from China should probably be revised to P. rosae after re-examining the specimens. The description and illustration of P. pannosa in Shin (2000) from Korea are also more in line with P. rosae and in need of revision. There are numerous morphological descriptions of P. pannosa that appear to be composed of characteristics of both P. pannosa and P. rosae (Braun 1987, 1995; Liu 2010; Braun and Cook 2012).</p><p>The confusions and misidentifications were documented as early as Salmon’s monograph (1900). He postulated that the primary reason for this confusion was the erroneous assumption that the species of fungus that occurs on a certain host plant in one part of the world will be the same as that growing on the same host in other parts of the world. As such, many powdery mildews on Rosa spp. were identified as P. pannosa, and the other possible species were ignored. In addition, the chasmothecia of P. pannosa are rarely formed (Salmon 1900; Blumer 1933; Homma 1937; Junell 1967; Nomura 1997), so the fact that chasmothecia of P. rosae appear to be more common than those of P. pannosa may be another reason for the confusion. To our knowledge, P. rosae often forms chasmothecia in China in late autumn when the temperature decreases. Chasmothecia of P. pannosa are rarely formed, even when chasmothecia of P. rosae are formed at the same time and place. The chasmothecia of P. pannosa can be found in winter or even the following spring, and they are primarily formed on stems, rarely on leaves, with abundant secondary mycelium. The more frequently produced chasmothecia of P. rosae are undoubtedly the reason that they have often erroneously been assigned to P. pannosa, at least before these two species were separated. Consequently, on account of the persistent taxonomic confusion between these two species, the distribution and host range require further clarification. In this study, host range and distribution are listed based on the results of the phylogenetic analysis (see Fig. 3).</p></div>	https://treatment.plazi.org/id/17EF615C56625F30A2A42B9457C570C7	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Jin, Dan-Ni;Wang, Shuang-Bao;Guan, Le-Ping;Wu, Xue-Lian;Feng, Jing;Liu, Li;Bradshaw, Michael;Braun, Uwe;Yang, Jing-Han;Yu, Shou-Rong;Li, Yu;Liu, Shu-Yan	Jin, Dan-Ni, Wang, Shuang-Bao, Guan, Le-Ping, Wu, Xue-Lian, Feng, Jing, Liu, Li, Bradshaw, Michael, Braun, Uwe, Yang, Jing-Han, Yu, Shou-Rong, Li, Yu, Liu, Shu-Yan (2026): Revision of powdery mildews (Ascomycota, Erysiphaceae) on Rosa in China: unexpected taxonomic complexity with phytopathological implications. IMA Fungus 17: e 184484, DOI: 10.3897/imafungus.17.184484
939B626CC8095AA2B5B58DC411D12293.text	939B626CC8095AA2B5B58DC411D12293.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Podosphaera rosae (Jacz.) D. - N. Jin & S. - Y. Liu 2026	<div><p>Podosphaera rosae (Jacz.) D. - N. Jin &amp; S. - Y. Liu comb. nov.</p><p>Fig. 8</p><p>≡ Sphaerotheca rosae (Jacz.) Z. - Y. Zhao, Acta Microbiol. Sin. 4: 439, 1981.</p><p>Basionym.</p><p>Sphaerotheca macularis f. rosae Jacz., Karmannyi opredelitel’ gribov II. Muchnistorosyanye griby: 76. 1927.</p><p>Type.</p><p>Lectotype (designated here, MBT 10029826), • original illustration in Jaczewski (1927: 77, fig. 19). Epitype (designated here, MBT 10030086): China • Shaanxi, Yulin, on Rosa davurica, 18 Oct. 2023, L. Liu &amp; Z. - Y. Zhang (HMJAU -PM 92763). Ex-epitype sequences: PX 239405 (ITS), PX 239284 (28 S), PX 239896 (IGS) .</p><p>Mycelium on stems and both sides of leaves, more abundant on the lower surfaces of the leaves, infected shoots often curled and distorted, forming irregular patches or effuse, persistent; primary hyphae hyaline, thin-walled, 3.0–4.5 μm wide, secondary hyphae hyaline, thick-walled, 3.5–6 μm wide, sparsely branched, often intertwined with each other on the lower surface of the leaves; hyphal appressoria indistinct to nipple-shaped, solitary or side by side; conidiophores arising from the upper surface of mother cells, erect, very long, 65–240 (– 342) × 7–10.5 μm, foot cells straight, cylindrical, long, 31–195 (– 302) × 7–10.5 μm, followed by 2–3 shorter cells, forming catenescent conidia; conidia doliiform to ellipsoid, 22–29 (– 31) × 11.5–15.5 (– 16.5) μm, length / width ratio 1.5–2.3; germ tubes almost terminal or terminal, short or long. Chasmothecia scattered, subglobose to globose, amphigenous, mostly on the lower surface of leaves, (74 –) 77–101 (– 106) μm diam.; peridium cells round to irregularly polygonal, 6.5–17.5 μm diam.; appendages mycelioid, some of them slightly spirally twisted at the base, arising from the equator of the chasmothecia, sometimes curved, wall thick and smooth, light brown below, paler towards the apex, numerous, various in length, (59 –) 80–405 (– 483) μm, 4–6 μm in width, septate; ascus ovoid to broad fusiform, colorless, thick-walled, sessile, 84–116 (– 121) × 56–79 μm, length / width ratio 1.3–1.6, terminal oculus obvious, large, 17–27 μm diam., 8 - spored; ascospores ellipsoid – ovoid, colorless, 20–26 × 10–15 μm, length / width ratio 1.5–2.2.</p><p>Additional specimens examined.</p><p>• A total of 33 specimens were examined, including 27 specimens with voucher numbers HMJAU -PM 92759 to HMJAU -PM 92785 and six specimens from Herbarium Mycologicum Academiae Sinicae, HMAS 01630, HMAS 14132, HMAS 39017, HMAS 39018, HMAS 39019, and HMAS 39020. Detailed specimen information is presented in Suppl. material 1.</p><p>Host range and distribution.</p><p>On Rosa ( davurica, koreana, multiflora, rugosa, sp.), Rosaceae; Asia (China, Korea).</p><p>Notes.</p><p>This species was once proposed as Sphaerotheca rosae by Zhao (1981) and accepted by Zheng and Yu (1987), whereas most other authors considered this name a synonym of P. pannosa (Braun 1987, 1995; Shin 2000; Liu 2010; Braun and Cook 2012). After our detailed examinations, including the results of sequence analyses, Zhao’s (1981) taxonomic treatment can be confirmed, i. e., S. rosae can be confirmed as a species. P. rosae is different from P. pannosa in (1) forming chasmothecia mostly on the lower surfaces of the leaves; (2) having longer conidiophores and foot cells; (3) smaller chasmothecia and asci with larger terminal oculi; and (4) longer chasmothecial appendages. Sequences of S. rosae, including ex-type sequences (PX 239400 and PX 239279 from HMAS 39018; PX 239428 and PX 239307 from HMAS 39020), grouped together in a monophyletic, highly supported clade separate from the P. pannosa clade. As a result, S. rosae should be reinstated as the new combination Podosphaera rosae . P. pannosa reported by Lee et al. (2011) on Rosa rugosa in Korea is morphologically and phylogenetically consistent with P. rosae .</p></div>	https://treatment.plazi.org/id/939B626CC8095AA2B5B58DC411D12293	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Jin, Dan-Ni;Wang, Shuang-Bao;Guan, Le-Ping;Wu, Xue-Lian;Feng, Jing;Liu, Li;Bradshaw, Michael;Braun, Uwe;Yang, Jing-Han;Yu, Shou-Rong;Li, Yu;Liu, Shu-Yan	Jin, Dan-Ni, Wang, Shuang-Bao, Guan, Le-Ping, Wu, Xue-Lian, Feng, Jing, Liu, Li, Bradshaw, Michael, Braun, Uwe, Yang, Jing-Han, Yu, Shou-Rong, Li, Yu, Liu, Shu-Yan (2026): Revision of powdery mildews (Ascomycota, Erysiphaceae) on Rosa in China: unexpected taxonomic complexity with phytopathological implications. IMA Fungus 17: e 184484, DOI: 10.3897/imafungus.17.184484
7C92D18CB9D556D4AB37B080690134EE.text	7C92D18CB9D556D4AB37B080690134EE.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Podosphaera rosae-xanthinae D. - N. Jin & S. - Y. Liu 2026	<div><p>Podosphaera rosae-xanthinae D. - N. Jin &amp; S. - Y. Liu sp. nov.</p><p>Fig. 9</p><p>Etymology.</p><p>Epithet derived from the name of the type host species, Rosa xanthina .</p><p>Type.</p><p>Holotype: China • Jilin, Changchun, on Rosa xanthina, 8 Aug. 2023, D. N. Jin &amp; X. L. Wu (HMJAU -PM 92790). Ex-holotype sequences: PX 239433 (ITS), PX 239312 (28 S), PX 239920 (IGS) . Isotype: HMAS 354228 .</p><p>Diagnosis.</p><p>Close to Podosphaera pannosa, but differing in having shorter conidiophores and smaller asci, and forming a separate well-supported species clade in the phylogenetic analysis.</p><p>Description.</p><p>Mycelium on stems and both sides of leaves, more abundant on the lower surface of the leaves, forming irregular patches or effuse, persistent, infected shoots often curled and distorted, primary mycelium white, secondary mycelium in dense, pannose patches on the stems; primary hyphae hyaline, thin-walled, 2.5–5 μm wide, secondary hyphae hyaline, thick-walled, 3.5–5.5 μm wide, sparsely branched; hyphal appressoria indistinct to nipple-shaped, solitary or side by side; conidiophores arising from the upper surface of mother cells, erect, 48–91 (– 96) × 7–9.5 μm, foot cells straight, cylindrical, (24 –) 26–56 (– 61) × 6.5–9.5 μm, followed by 2–3 shorter cells, forming catenescent conidia; primary conidia obovoid, secondary conidia doliiform to ellipsoid, 18.5–25 × 11–14.5 μm, length / width ratio 1.4–1.9; germ tubes almost terminal to almost lateral, short. Chasmothecia gregarious, subglobose to globose, immersed in the secondary mycelial patches, mostly on the stems, (71 –) 73–96 μm diam.; peridium cells round to irregularly shaped, 5–21 (– 26) μm diam.; appendages mycelioid, simple, short, arising from the lower half of chasmothecia, usually curved, hyaline throughout or light brown below, paler towards the apex, septate, variable in length, usually 0.2–1 times as long as the chasmothecial diam.; ascus ovoid to ellipsoid, colorless, thick-walled, sessile or short-stalked, 73–102 × 57–71 (– 75) μm, length / width ratio 1.2–1.6, terminal oculus inconspicuous to distinct, (11 –) 14–26 μm, 8 - spored; ascospores ellipsoid – ovoid, colorless, 23–28 × 15.5–18.5 μm, length / width ratio 1.4–1.7.</p><p>Additional specimens examined.</p><p>• A total of eight specimens were examined under the vouchers from HMJAU -PM 92786 to HMJAU -PM 92793. Detailed specimen information is presented in Suppl. material 1.</p><p>Host range and distribution.</p><p>on Rosa ( xanthina), Rosaceae; Asia (China).</p><p>Notes.</p><p>Asexual powdery mildew morphs are common on Rosa xanthina . The conidiophores and foot cells are usually shorter than those in Podosphaera pannosa . Conidia are also smaller, and the length / width ratio is always less than 2. Chasmothecia are usually formed and are immersed in secondary mycelial patches on twigs in late autumn or early winter. The teleomorph of powdery mildew on Rosa xanthina is similar to P. pannosa, but differs in having broader asci, sometimes with stalks. Sequences of the powdery mildew on R. xanthina form a well-supported, separate species clade in phylogenetic analyses. As a result, a new species, P. rosae-xanthinae, is described, which is so far known only on R. xanthina .</p></div>	https://treatment.plazi.org/id/7C92D18CB9D556D4AB37B080690134EE	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Jin, Dan-Ni;Wang, Shuang-Bao;Guan, Le-Ping;Wu, Xue-Lian;Feng, Jing;Liu, Li;Bradshaw, Michael;Braun, Uwe;Yang, Jing-Han;Yu, Shou-Rong;Li, Yu;Liu, Shu-Yan	Jin, Dan-Ni, Wang, Shuang-Bao, Guan, Le-Ping, Wu, Xue-Lian, Feng, Jing, Liu, Li, Bradshaw, Michael, Braun, Uwe, Yang, Jing-Han, Yu, Shou-Rong, Li, Yu, Liu, Shu-Yan (2026): Revision of powdery mildews (Ascomycota, Erysiphaceae) on Rosa in China: unexpected taxonomic complexity with phytopathological implications. IMA Fungus 17: e 184484, DOI: 10.3897/imafungus.17.184484
