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Nabalus albus

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Nabalus albus in bloom on the Bruce Trail near Hamilton, Ontario, Canada.

Nabalus albus, the white rattlesnake-root, also known as Boott's rattlesnake-root<ref name="uvm">Template:Cite web</ref> or white lettuce, is a plant in the family Asteraceae, native to Canada and the Eastern United States.<ref>Plants for a Future</ref><ref name="Go Botany">Template:Go Botany</ref><ref>US Department of Agriculture plants profile</ref> Details of the flower heads are needed to separate this species from others in the rattlesnake-root genus (Nabalus). The Iroquois applied a poultice of the roots of white rattlesnake root to rattlesnake bites. It can be found growing in forests, woodlands, and anthropogenic habitats. The flower head has ray flowers only, meaning all of the individual flowers of the flower head have a strap-shaped ray, which may or may not have teeth at the very tip of the ray. The colors vary from blue to purple, pink to red, or white. The leaf blade length can be between 40 and 300 mm. while the flower head width can be 3 to 5 mm.<ref name="Go Botany" /> Blooms from July to September in Missouri.<ref name=Yatskievych>Yatskievych, G. 2006. Steyermark's Flora of Missouri. 3 Vols. The Missouri Botanical Garden Press, St. Louis, MO, USA. Vol. 2: 377-382</ref> In 2010 it was reclassified from the genus Prenanthes to Nabalus.<ref>https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=38273#null</ref>


Map of where the plant lives

White rattlesnake-root is native to Canada and the Eastern United States west into North Dakota, northeast Missouri<ref name=Yatskievych/>, and four counties in northwest Arkansas, and four counties in northwest Arkansas<ref name =Yatskievych/><ref>Gentry, J.L.; Johnson, J.P.; Baker, B. T.; Witsell, C. T.; Ogle, J. D., eds. 2013. Atlas of the Vascular Plants of Arkansas. University of Arkansas Herbarium, Fayetteville, AR, USA</ref>. It is commonly present in Connecticut, Maine, Massachusetts, New Hampshire, and Vermont.<ref name="Go Botany" />



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