Defining the characteristics of individual leaves is part of tree morphology, or the study of the physiological structure of trees. All trees have a leaf structure that can be classified as either ...

For short-lived spring wildflowers such as wood anemone (Anemone quinquefolia) and Dutchman's breeches (Dicentra cucullaria), timing is everything. These fleeting plants, known as ephemerals, grow in ...

Add Yahoo as a preferred source to see more of our stories on Google. For broad-leaved trees like the holm oak, which grows in Mediterranean climates with dry summers and rainy winters, this seasonal ...