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Yellow flag iris is an excellent example of a plant that is benign, even beneficial, in its native habitat of Northern Europe, where harsh winters keep it in check, but is a worrisome nuisance when it travels abroad. Sadly, it can now be found cheaply through online distributors like Craigslist at low cost because it is so easy to cultivate. And in the time honored tradition of sharing successful garden plants with your neighbors, people are literally giving it away! But when

​​The collection of sketches is quite beautiful. The book contains 75 illustrations of flora from around the world, dating from the 15th...

This beautiful native is listed as a "vulnerable" plant meaning that the population size in its native PNW area is decreasing at a rate...

Native to Europe and temperate Asia, leafy spurge currently is found throughout the world with the exception of Australia. It was probably introduced into the United States as a contaminant in imported grain. Since its introduction, the plant has become a serious management problem, particularly for the north and central plains states. All Oregon infestations have come under yearly control and are being mostly held in check.

When I first moved to Oregon and encountered the diminutive but fiery vine maple (acer circinatum) I was immediately enchanted. Vine...