Lewis and Clark National and State Historical Parks - Fort Clatsop's next free guest speaker presentation is "The Plants of Fort Clatsop - An Ethnobotanical Tour of the Journals" by Judith Lampi, 1 p.m. Sunday.

Lampi is an educator with experience in Northwest history and ethnobotany, the study of the relationships between people and plants. Her PowerPoint presentation focuses on the ethnobotany of plants mentioned in the Lewis and Clark Journals during the Corps of Discovery's stay at Fort Clatsop.

Americans trace their knowledge of the Pacific Northwest region and its plants to the observations made by Lewis and Clark. But long before that time, American Indians had learned through experience to use the plants around them for many purposes. Traditional medicinal uses range from applying tree pitch, macerated leaves, or solutions from various plant parts to wounds, burns, warts and skin infections, to chewing roots or leaves for sore throats and coughs, to drinking "teas" made from various plants or mixtures of plants for many different purposes.

This presentation is part of the monthly free speakers' forum, "In Their Footsteps: Corps Observations," sponsored by the Fort Clatsop Historical Association, Astor Haus Bed and Breakfast, Lucy's Books, and the Red Lion Inn. These programs are held in the Netul River Room of Fort Clatsop's Visitor Center.

For more information, call the park at 861-2471.