Viburnum in the context of "Sudden oak death"

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⭐ Core Definition: Viburnum

Viburnum is a genus of about 150–175 species of flowering plants in the moschatel family, Adoxaceae or its alternative name Viburnaceae. Its current classification is based on molecular phylogeny. It was previously included in the honeysuckle family Caprifoliaceae.

The member species are evergreen or deciduous shrubs or (in a few cases) small trees native throughout the temperate Northern Hemisphere, with a few species extending into tropical montane regions in South America and southeast Asia. In Africa, the genus is confined to the Atlas Mountains.

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👉 Viburnum in the context of Sudden oak death

Phytophthora ramorum is the oomycete known to cause the disease sudden oak death (SOD). The disease kills oak and other species of trees and has had devastating effects on the oak populations in California and Oregon, as well as being present in Europe. Symptoms include bleeding cankers on the tree's trunk and dieback of the foliage, in many cases leading to the death of the tree.

P. ramorum also infects a great number of other plant species, significantly woody ornamentals such as Rhododendron, Viburnum, and Pieris, causing foliar symptoms known as ramorum dieback or ramorum blight. Such plants can act as a source of inoculum for new infections, with the pathogen producing spores that can be transmitted by rainsplash and rainwater.

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Viburnum in the context of Adoxaceae

Adoxaceae, commonly known as moschatel family, is a small family of flowering plants in the order Dipsacales, now consisting of five genera and about 150–200 species. They are characterised by opposite toothed leaves, small five- or, more rarely, four-petalled flowers in cymose inflorescences, and the fruit being a drupe. They are thus similar to many Cornaceae.

In older classifications, this entire family was part of Caprifoliaceae, the honeysuckle family. Adoxa (moschatel) was the first plant to be moved to this new group. Much later, the genera Sambucus (elders) and Viburnum were added after careful morphological analysis and biochemical tests by the Angiosperm Phylogeny Group. An additional monotypic genus Sinadoxa has been added based on molecular comparison with Adoxa.

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LINKED FROM (PARENTS)
← Sudden oak death ← Adoxaceae
LINKS TO (CHILDREN)
Genus → Species → Flowering plant → Family (botany) → Adoxaceae → Molecular phylogeny → Honeysuckle → Caprifoliaceae → Evergreen → Deciduous → Shrub → Montane → Atlas Mountains →