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The diagnostic keys in most floras distinguish Catalpa and Paulownia by the position of their leaves. Catalpa: part of the leaves in whorls of three. Paulownia: leaves opposite. A few days ago I...
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Earlier this year in the German town of Wittlich I noticed a Geranium species I had never seen before. The plants grew in a lawn together with Bellis perennis and other common species. I asked the...
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