A study of 10 Northeastern urban forests shows no sign that there is a common urban park plant complex, but does show that population levels affect both native and nonnative species diversity, according to a Penn State study.

The Worcester Art Museum and Tower Hill Botanic Garden come alive this February for our Fifth Annual Flora in Winter celebration, the premier floral design event of the year. Skilled artisans from across New England create clever, provocative interpretations at both venues.

Morocco possesses a rich and varied flora, owing partly to its great diversity of relief and landscapes. However, advancing erosion and processes of desertification, combined with the development of human activities, are damaging this biodiversity.