Scott Marks 1:30 p.m., Sept. 17
Liquidambar Trees, or sweet gums, the colorfully deciduous trees gracing front yards, parks, and campuses throughout the San Diego area, have been putting on a good show for the past month. The maplelike leaves of some varieties have turned from green to purple to red; the leaves of other varieties have faded to a golden yellow. Other varieties will hold on to their leaves until the New Year. Most will regain their foliage by late February.