At least “talus” seems
the most appropriate way translate “Blockhalden”
[literally meaning “block waste dumps”]
but I might note that in Cactus (Paris), Ritter 1966 gave “Rocky
hills” and in-habitat pictures of similar Trichs commonly show
them growing in demi-mountainous terrain strewn with boulders. Ritter may have been referring to this
type of country.