Autumn Landscape with Four Trees, Vincent van Gogh
You might come across versions of this image on the web that are much more colorful — with bright oranges and reds — but despite Van Gogh’s penchant for brilliantly high-chroma paintings in his later career, I don’t believe that’s the case here.
I haven’t see the original, but this is from the middle of Van Gogh’s career, a point at which he was surprisingly true to nature (and to the 17th century Dutch painters from which he initially took inspiration), and it looks to me like these are brown leaves on an overcast day.
The best reproduction I’ve found is on WikiArt (large version here). The original is in the Kröller Müller Museum, whose small, dim website reproduction is not very helpful.