Rhytismatales

order of fungi

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Last updated

July 19, 2026

Quick Summary

The order Rhytismatales is a group of fungi that are pathogenic to plants. These fungi produce asci with apical rings, and their ascomata develop within host tissues. The ascospores are typically long and thin. This order includes fungi commonly known as tar spot fungi, with example genera such as Rhytisma, Lophodermium, and Cudonia. The genus Rhytisma specifically forms black stromata, which are visible as tar spots on infected plants.12

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fungus
Annotated classification
Order Rhytismatales Pathogenic on plants; asci have apical rings; ascomata develop in host tissue; ascospores long and thin; includes tar spot fungi; example genera include Rhytisma, Lophodermium, and Cudonia Order Thelebolales Coprophilus (grows on dung); ascomata small, disk-shaped to globose; may have polysporus asci; example genera
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Order Rhytismatales Pathogenic on plants; asci have apical rings; ascomata develop in host tissue; ascospores long and thin; includes tar spot fungi; example genera include Rhytisma, Lophodermium, and Cudonia Order Thelebolales Coprophilus (grows on dung); ascomata small, disk-shaped to globose; may have polysporus asci; example genera
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