You probably don’t think you need a botany lesson when all you want to know is how to keep your Christmas tree fresh this season. But explaining a few things might make the whole process make sense.

One goes up... and one goes down. I was a college freshman in Botany 101 when I first learned about xylem and phloem, the two transport tissues which carry water and nutrients up and down a tree's ...

This is a preview. Log in through your library . Abstract Light microscopic studies of the petioles of Lagenaria siceraria reveal that the external phloem of each bicollateral vascular bundle develops ...

Circular patches of bark were surgically isolated on the sides of sugar maple (Acer saccharum Marsh.) trees at breast height at various times during the dormant and growing seasons. Subsequently, ...