Identifying which category a tree ... simple or compound, will have a bud node at the place of petiole attachment to the twig. Compound leaves have a bud node at the base of each stem or petiole ...

The Tree of Life is flourishing. The Web-based project, a massive collaboration among scientists from all over the world, is growing more "leaves" and ... There's no one book that has this ...

leaves, flowers, or nothing representational at all,” the authors noted in the study. The researchers also examined Gustav Klimt’s 1909 painting “L’Arbre de Vie” (“Tree of Life”).