This plant was described by F.Katterman in an article written in a specialistic journal by native chilean plants. Population isn't in a good condition, too dry situation. 

My oldest seedling of algarrobensis. Sown in 2010. Very slow grown, but nice form.Photo of 2021
My oldest seedling of algarrobensis. Sown in 2010. Very slow grown, but nice form.Photo of 2021
same plant one year later
same plant one year later