7, it will be against regulation to grow or sell Callery pears in Ohio. Callery pears did not turn out to be useful for fireblight resistance when crossed with fruiting pear, but was used as an ornamental, with unfortunate serious modern-day consequences as an invasive species.Ĭan’t win ’em all: by Jan. Over time this is a tree that can reach 9. The slow growth rate makes it an ideal tree for smaller gardens. Grown as a small feature tree, growth rate is slow, a 10 year old specimen would be like to reach around 3 metres (9ft) in height. It is caused by a bacterium then classified as Bacillus amylovora (later changed to Erwinia amylovora in honor of Erwin). A maple tree that you could grow for the bark alone, Acer griseum is commonly called the Paperbark Maple. Smith of the USDA, who wanted him to find pears of genetic resistance to the deadly fireblight disease of pears and apples. He found this pear along the Yangtze River, fulfilling the charge of his boss Erwin F. Plant Lovers' Almanac: What the Romans and Bob Dylan had to say about cornįinally, an example of the tricky realities and unintended consequences of plant exploration and introduction is one more plant introduced by Frank Meyer: he brought back 500 pounds of seeds of Callery pear. I will have to roam around in my next life.” A few years later the Arnold Arboretum at Harvard University introduced it into America. He sent seeds to Veitch Nurseries in England in 1899, and the tree was first available in 1901. When I think about all these unexplored areas, I get fairly dazzled one will never be able to cover them all. The Paperbark Maple ( Acer griseum) was discovered by the famous plant collector Ernest Wilson, growing in central China. What followed were four extensive collection trips to China, Korea, Mongolia, Siberia, and the Middle East.Īs fellow economic plant introducer David Fairchild wrote of Meyer’s detailed collection notes: “his suggestions are backed up by living material which will make it easy to provide the breeders with many of the plants which he describes.” In a letter to Fairchild in 1907, Meyer wrote: “Our short life will never be long enough to find out all about this mighty land. Meyer immigrated to America in 1901, eventually working for the USDA’s Plant Introduction Station in Santa Ana, California. Frank Meyer (1875-1918) was an influential naturalist.īorn Frans Nicholas Meijer in Amsterdam, he worked in European nurseries and as an assistant to Hugo de Vries, the Dutch botanist and early geneticist who postulated the idea of genes.
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