 | This article relies largely or entirely on a single source .(September 2025) |
| Cystotheca mexicana | |
|---|---|
Scientific classification  | |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Leotiomycetes |
| Order: | Erysiphales |
| Family: | Erysiphaceae |
| Genus: | Cystotheca |
| Species: | C. mexicana |
| Binomial name | |
| Cystotheca mexicana M. Bradshaw, Coombes & Cont.-Paredes, 2023 | |
Cystothecamexicana is a species of powdery mildew in the family Erysiphaceae. It is found in Mexico on plants in the genus Quercus .
Cystothecamexicana forms white mycelium on the underside of leaves. Cystothecamexicana, like most Erysiphaceae, is highly host-specific and only infects species in the genus Quercus . It has only been found on oak hybrids with at least one species endemic to Mexico, including Quercus glaucoides × Quercus microphylla and Q. liebmannii × Q. microphylla . Another species infecting Quercus in North America, Cystotheca lanestris , is found on a variety of oak species, and can be found in north-western Mexico. This species can cause witch's-broom galls. Microscopically, C. lanestris has fibrosin bodies and longer special aerial hyphae than C. mexicana. [1]
The fungus was formally described in 2023 by Michael Bradshaw, Allen J. Coombes and Carlos Contreras-Paredes. The type specimen was collected in Mexico, the country from which the specific epithet also takes its name. [1]
 | This article needs additional or more specific categories .(September 2025) |