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Editor's Picks

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The Morton Arboretum, in collaboration with Botanic Gardens...
Website Editor | Jul 17, 2019
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Stelian Radu, a founding member of the IOS, accomplished an...
Website Editor | Jun 16, 2019
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Scientists in Poland have successfully micropropagated 500...
Website Editor | May 30, 2019

Plant Focus

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Quercus look is one of the least-known oaks of the arid mountains of the Middle East. It grows on Mount Hermon and in the Anti-Lebanon...

Dendrology

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The Morton Arboretum, in collaboration with Botanic Gardens Conservation International U.S., are conducting a global ex-situ collections survey of six priority tree genera: Acer, Magnolia, Malus, Quercus, Tilia, and Ulmus. These genera encompass The Morton Arboretum’s six nationally accredited collections through the Plant Collections Network.

Cloning Old Oaks in Poland

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Scientists in Poland have successfully micropropagated 500- to 800-year-old oaks and two of the saplings were planted in April.

The Israeli Oak Association

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A new association aims to raise and improve the status of the oak trees in Israel.

Exploring for Quercus ajoensis and Q. toumeyi

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The Huntington, in San Marino, CA, obtained a grant from American Public Gardens Association to study Quercus ajoensis and Q. toumeyi in collaboration with the Arizona-Sonora Desert Museum (ASDM) in Tucson, AZ. The objectives were to scout localities where the two Quercus species had been observed in the past, confirm or deny presence of the species in several mountain ranges which have poorly documented or otherwise dubious records, collect acorns or material for micropropagation, and voucher the species at each location.

Action Oak

The Action Oak partnership was launched at this year’s Chelsea Flower Show in London last May

In October 2017, I visited Palomar Mountain State Park, San Diego County, California to collect acorns of the interior live oak, Quercus wislizeni (Section Lobatae), for an investigation of oak hybridization at that location. Following the first day on site, while reviewing the day’s leaf samples, acorns, and photographs, a chance photo with an oblique view suggested that one individual Q. wislizeni bore yellow or golden hairs on the abaxial leaf surface.

Oak Genome Reveals Facets of Long Lifespan

New research published in Nature Plants provides insights into why oaks are long lived. 

North America is home to 91 species of oak trees. Astoundingly, the various species rarely, if ever, occur alone. Where one kind of oak is found, invariably at least one more will be found. How can nature support a setup like that when it operates on the principle that only the fittest survive in any one setting?

Illinois State Museum features dwarf chinkapin oak, discovered in Illinois during an IOS Tour, as part of the Illinois Bicentennial exhibition.

Plant pathologists from the California Department of Agriculture (CDFA) recently identified a new species of fungal pathogen that infects oak, chinkapins, and tanoaks. Until recently, North American diagnosticians called all species of the genus Tubakia that infects oaks in North America, Tubakia dryina, because they all have very similar morphological features to this European fungus. However, a new study shows that the North American species vary genetically from Tubakia dryina. Among these is the newly recognized California species.

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