"autumn forest" is correct and usable in written English.
You can use it to describe a forest during the autumn season, for example: "The trees in the autumn forest were covered in a blanket of red and yellow leaves."
There's a red thicket down in one, like a miniature autumn forest in a bigger landscape.
Instead of a hunk of meat, it resembles the floor of an autumn forest – the Blackmore cut is raw and smoked, giving it a lovely pink colour.
Oh, and did I mention that the mushrooms should have been in a bag in the fridge for a day or so, so that they become a bit damp and woodsy, and smell like an autumn forest underfoot?
Thoreau made clear that looking at the colors of the autumn forest is very different from actually seeing them.
She collected more than 100 photos of inmates posing in prison visiting rooms against misty waterfalls, autumn forests, city skylines and bald eagles.
Red oak leaves turn to a deep, rich red which bursts out boldly from the late-autumn forest.[7].
This mountainous road winds around the island's northeastern corner, affording views of crashing surf and, in autumn, dazzling forest colors.
Our results demonstrate that, despite the presence of time series gaps, LPA provides a robust basis for retrospective analysis of long-term changes in spring and autumn deciduous forest phenology over the last three decades.
But in autumn, the forest is stunning, with vivid colours that rival New England's changing leaves.
With the arrival of autumn the forests and woodlands of the Northern Hemisphere are gradually transforming into a striking natural show of russet, vermillion, gold, bronze and yellow.
