Charley Eiseman and Noah Charney, authors of Tracks & Sign of Insects and Other Invertebrates, will conduct a special session for the New England Botanical Club on Friday, May 6, beginning at 5:30 pm at Garden in the Woods in Framingham, Massachusetts, on the topic Invertebrates on Plants: Identifying Galls, Mines, Leaf-ties, and Other Signs in a New Field Guide. For more information, log on to www.rhodora.org.