Join a Pinellas County Extension specialist and examine the basics of plant identification, from using simple keys to identifying critical characteristics that will help any would-be botanist in the field. An emphasis will be placed on flowering plants, but ferns will be included as well. Registration is required and all materials will be provided. Wear comfortable shoes, as part of the class will be outdoors. 10:30 a.m. to noon. Free. Weedon Island Preserve, 1800 Weedon Drive NE, St. Petersburg. (727) 453-6500; www.weedonislandpreserve.org.