Tree In Alaska, the sap of the sweet birch ("Betula lenta") is made into a syrup with a sugar content of 67%. Sweet birch sap is more dilute than maple sap; a hundred litres are required to make one litre of birch syrup. Various parts of trees are used as spices. These include cinnamon, made from the bark of the cinnamon tree ("Cinnamomum zeylanicum") and allspice, the dried small fruits of the pimento tree ("Pimenta dioica"). Nutmeg is a seed found in the fleshy fruit of the nutmeg tree ("Myristica fragrans") and cloves are the unopened flower buds of the clove
A City is Not a Tree A City is Not a Tree A City is Not a Tree is a widely cited 1965 essay (later published as a book) by the architect and design theorist Christopher Alexander, first published in the journal "Architectural Forum", and re-published many times since. In 2015 the essay was published as a book including new exegesis commentaries on the original essay from other architects, engineers and physicists. "A City is Not a Tree" has been widely described as a landmark text, and the Resource for Urban Design Information calls it "one of the classic references in the literature of the built