what is tree sap called
The sap often is harvested from the Sugar Maple, Acer saccharum. In some countries (e.g., Lithuania, Latvia, Estonia, Finland, Belarus, Russia) harvesting the early spring sap of birch trees (so called  birch juice ) for human consumption is common practice; the sap can be used fresh or fermented and contains xylitol.ylem sap consists primarily of a watery solution of hormones, mineral elements and other nutrients. Transport of sap in xylem is characterized by movement from the roots toward the leaves.