Seiridium (anamorphic genus)

Xylariales • Sordariomycetes • Ascomycota • fungi • plant diseases • pests-diseases-weeds

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Seiridium spp. - A-F) disease symptoms on Cupressaceae, G+H) acervuli, I) conidial masses in culture, J+K) conidiophores, L to R) conidia, S+T) ascomata, U) ascospores - scale bars: F = 2 mm, G+H = 50 μm, J to U = 10 μm (click on image to enlarge it)
Author(s): Y. Marin-Felix et al.
Source: Studies in Mycology (2019), 94, p. 80

Seiridium Nees 1817

The genus Seiridium is wide-spread and contains several plant pathogens which infect cypress and related trees. The fungi typically enter the host through small woods and cause blighted branches and cankers on the trunk. Pruning woods are also a route of entry.

Economically, the most important species is Seiridium cardinale. That species is apparently native to North America and has been first described from California. It has spread to many countries outside this region, causing epidemics on Cupressus species, e.g. in the Mediterranean region.

Seiridium species have 5-septate conidia with appendages and typically form asexual fruiting bodies (acervuli) on the plant host. For taxonomic reviews of this genus see Bonthond et al. (2018) and Marin-Felix et al. (2019).

The following species are currently entered in the system:

• Seiridium cardinale
• Seiridium cupressi
• Seiridium eucalypti
• Seiridium unicorne