Nabalus racemosus aka Glaucous Or Purple Rattlesnakeroot

Nabalus racemosus belongs to Asteraceae, the daisy family. It is a perennial, so it lives for years. Its home range runs from Canada into the United States. There, it grows in the north and east-central states. Kew places it in a temperate climate. Chicago Botanic Garden calls it native to the Midwest. The RHS says it is not native to Britain or Ireland. The garden sources use the name Prenanthes racemosa. Chicago calls it glaucous white lettuce.

This plant grows upright and lives for more than one year. It thus forms a lasting planting, not a one-year display. The garden profile gives no height or spread. It gives no sizes for leaves or stems, either. These gaps leave its full size in a border unclear. Its common name does not prove what shape its leaves take. Nor does that name tell us about their surface. The sources give no more facts on roots or branches.

Chicago Botanic Garden lists pink and white flowers. It lists blooms in July and August, then September and October. These dates place the bloom season from summer into fall. They do not prove each plant blooms through that whole span. The profile notes that the plant draws birds and butterflies. It does not name the kinds that visit. It gives no facts on fruit, seeds, or flower parts. Butterfly visits alone do not prove how pollen moves between flowers.

For garden use, Chicago advises full sun and moist soil. It lists USDA hardiness zones 3 through 7. The profile places this upright, long-lived plant in beds and borders. Its late blooms and appeal to wildlife support these uses. The sources give no preferred soil texture or soil pH. They do not say how well it copes with drought. They give no tips on pruning or feeding. Nor do they say how to grow new plants.

The records do not describe pests or plant diseases. They give no proof of food or medicinal uses. The name white lettuce does not mean it is safe to eat. Neither source shows that it is safe for people or pets. These gaps leave too few facts to rate its risk of harm. They also leave too few facts to rate ease of care.