Joshua trees are weird. I say this as an expert on Joshua trees. Joshua trees look weird — their twisty branches end in bouquets of stiff, knife-like leaves, which die back to hang from the branches ...

A model train rounds the poinsettia tree at Lauritzen Gardens. The tree has become the botanical garden’s biggest attraction each year. The plants are watered by an internal irrigation system.

African umbrella acacia trees grow more during droughts, contrasting with the conservative splendid thorn acacia, a study in The Plant Journal shows.