Plant and gardening info — Fine Garden Creations
Vernonia Iron Butterfly | Bluestone Perennials
Plant Profile: Letterman's Narrowleaf Ironweed (Vernonia lettermanii 'Iron Butterfly') - Dyck Arboretum
Vernonia lettermanii Iron Butterfly | White Flower Farm
Vernonia Iron Butterfly Ironweed for Sale| Rare Roots
Vernonia lettermanii Iron Butterfly, Iron Butterfly Ironweed | High Country Gardens
Vernonia lettermannii 'Iron Butterfly' (narrowleaf ironweed cultivar) | Izel Native Plants
Vernonia lettermanii 'Iron Butterfly' Ironweed from Saunders Brothers Inc
Vernonia lettermannii, Threadleaf Ironweed
Vernonia lettermanii 'Iron Butterfly' - Iron Butterfly Ironweed Broken Arrow Nursery
Threadleaf Ironweed (Vernonia lettermannii 'Iron Butterfly') – Perennial Farm Marketplace
Plant Profile: Letterman's Narrowleaf Ironweed (Vernonia lettermanii 'Iron Butterfly') - Dyck Arboretum
Tiarella 'Iron Butterfly' PP12396 COPF | Perennial Resource
Vernonia lettermannii 'Iron Butterfly'
Vernonia lettermannii 'Iron Butterfly' - Horsford Gardens and Nursery
1 Vernonia ‘Iron Butterfly’/Ironweed - Bates Nursery & Garden Center
Vernonia Iron Butterfly Ironweed for Sale| Rare Roots
Vernonia lettermannii 'Iron Butterfly' (Iron Butterfly Ironweed, Iron Butterfly Threadleaf Ironweed, Ironweed) | North Carolina Extension Gardener Plant Toolbox
Iron Butterfly Ironweed | NatureHills.com
Vernonia lettermannii 'Iron Butterfly', Ironweed – Dancing Oaks Nursery and Gardens
Vernonia lettermannii 'Iron Butterfly' - Iron Butterfly ironweed Native to North America (selection)
Ironweed 'Iron Butterfly' - Vernonia lettermannii 'Iron Butterfly'
Vernonia lettermannii 'Iron Butterfly' Vernonia from Sandy's Plants
Vernonia lettermannii 'Iron Butterfly' - Midwest Groundcovers, LLC
