American Beauties, Native Plants
ArborQuest
Birds of Baltimore
Cylburn Arboretum
E-Nature
Garden in the Woods
Garden in the Woods Nursery
Green Roofs for Healthy Living
Green Roof Plants
HeartWood Nursery
Horticultural Society of Maryland
Irvine Nature Center
Landscaping with Native Plants
MD Dept. of Natural Resources-Invasive Plant List
Maryland Wildflowers
Maryland Native Plant Society
Methuselah Tree
Museum of Garden History

Native Plant Alternatives to Invasive Plants
New England Wild Flower Society
North Creek Nurseries
Other Prairie Websites
Pennsylvania Native Plant Society
Rainscapes
Sierra Club
Shooting Star Nursery
Sunlight Gardens
The Champion Tree Project
The Lady Bird Johnson Wildflower Center
TKF link to Arboretum
Trees and Forestry - Ecology
Wild Flower
Woodlanders