Tens of thousands of mature street trees in Southern California are susceptible to a new, deadly fungal strain that kills at alarming speeds and threatens to destroy the urban forest in older cities ...

Offering the world a wall of glossy green leaves, it wraps around subdivisions and marches in neat flat lines down miles of roadway, dominating and cloaking local scenery. Dense, preened to boxy ...

CHAMPAIGN, Ill. -- The banyan fig tree Ficus microcarpa is famous for its aerial roots, which sprout from branches and eventually reach the soil. The tree also has a unique relationship with a wasp ...