Phragmidium handelii Petr.

Le résumé fourni par la source

Phragmidium handelii Petr., Meddn Göteb. Bot. Trädg. 17: 121. 1947 Description. Spermogonia, aecia, and uredinia not seen. Telia black, pulverulent, on fruits and branches, up to 2 cm diam.; teliospores 12–16 - celled, 69–101 × 19–24 μm, coarsely verrucose, apical papillae 2–10 μm long; pedicels 75–132 × 10–16 μm, slightly swollen at base. Specimens examined. China, • Gansu, Longnan City, Huagou, on Rosa corymbulosa Rolfe, 17 Jul. 2019, Yingmei Liang, Chengming Tian, Yun Liu, Cheng Peng (BJFC -R 03713); 4 May 2017, Bin Cao (BJFC -R 02982); • Gansu, Lintan County, Yeli Guan Daling Mountain, on R. webbiana Wall. ex Royle, 15 Aug. 2014, Yingmei Liang, Chengming Tian, Bin Cao (BJFC -R 01442); • Gansu, Gannan Tibetan Autonomous Prefecture, Diebu County, Lazikou Checkpoint, 18 Aug. 2014, Yingmei Liang, Chengming Tian, Bin Cao (BJFC -R 01485). For a complete list of all specimens examined, see Suppl. material 1. GenBank numbers. ITS: MW 729573 (BJFC -R 01442), MW 729574 (BJFC -R 01485), MW 729575 (BJFC -R 02982), MW 729576 (BJFC -R 03713); LSU: MW 729500 (BJFC -R 01442), MW 729501 (BJFC -R 01485), MW 729502 (BJFC -R 02982), MW 729503 (BJFC -R 03713). Notes. Distinguished by its 12–16 - celled teliospores (69–101 × 19–24 μm), this species possesses the highest number of teliospore cells recorded in the genus (Liu 2021). It forms large, crust-like telia on fruits and branches, often causing host deformities. In the phylogenetic tree, it occupies a well-supported clade distinct from other Rosa - associated species (Fig. 1).

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