The greek thermos means summer heat, for this month starting on July 19th and running to August 17th. After Year II (1793–94 because they also stopped using the Gregorian years this was renamed to Fervid from the latin, burning hot.
Brambles are covered in flowers that quickly start to develop in to the rich purple fruit later in autumn. They're also known as mwyaren, the photo-brythonic route is muɨar meaning berry, these are the fruits that our ancestors would have found everywhere, one of the major battles in our garden is keeping the brambles at bay!
This is a red-hot colour today, but with a hint of what's coming next month. All that heat is going to ripen the late summer fruit... It's the shop now.