Amur maple (Acer ginnala) August 2015 in Wibaux County, Montana. Original public domain image from Flickr https://www.rawpixel.com/image/3335407/free-photo-image-acer-ginnala-bush-cc0Free Image from public domain licenseAcer Stems (Different Varieties of Maple) enlarged 10 times https://www.rawpixel.com/image/2212325/vintage-close-plant-photographView licenseAntique illustration of acer platanoides https://www.rawpixel.com/image/263134/premium-illustration-psd-acer-platanoides-acer-antiqueView licenseAntique watercolor drawing of acer saccharinum https://www.rawpixel.com/image/263169/premium-illustration-psd-acer-saccharinum-antique-drawingView licenseAntique illustration of acer pensylvanicum https://www.rawpixel.com/image/263164/premium-illustration-psd-acer-pensylvanicum-antiqueView licenseAntique illustration of acer pseudoplatanus https://www.rawpixel.com/image/263099/premium-illustration-psd-acer-pseudoplatanus-acerView license