Author and historian Jill Jonnes tells the story of urban trees and the Americans who have passionately promoted the greening of our cities, including presidents, plant explorers, citizen activists, scientists, and nurserymen.

The Delaware Center for Horticulture, 1810 N. Dupont St., Wilmington will host the third in its four-part winter lecture series Thursday, Feb. 15 from 7-8 p.m.

The special guest will be author and historian Jill Jonnes on the topic  "Urban Forests -- A Natural History of Trees and People in the American Cityscape."

She will tell the story of urban trees and the Americans who have passionately promoted the greening of our cities, including presidents, plant explorers, citizen activists, scientists, and nurserymen. Ranging from Thomas Jefferson’s day through the postwar devastation of magnificent American elm canopies from Dutch elm disease to the present, Jonnes celebrates the nation’s arboreal advocates, who engage technology to illuminate the value of trees as green infrastructure and their importance to public health.

Her books will be available for purchasing and signing.

Admission is $20 for members and $30 for non-members.

The winter lecture series features leading minds and pioneers in various fields of horticulture exploring the connections between people and plants.

The fourth and final lecture this winter will feature Chantel White, Ph.D., discussing "Plants with a Past - Garden Archaeology" Thursday, Feb. 22 from 7-8 p.m.

The Delaware Center for Horticulture thanks the Garden Club of Wilmington, the Delaware Grounds Management Association, and Gateway Garden Center for sponsoring the lecture series speakers, and thanks Whole Foods Market for providing this year’s refreshments.

For more information, contact Mackenzie Knight-Fochs at (302) 658-6262, ext. 117.