puccoon

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of several North American plants of the genus Lithospermum, having orange or yellow flowers and roots that yield a red dye.
• noun Any of several plants, such as the bloodroot, whose roots yield a reddish dye.
• noun The dye from any of these plants.

from The Century Dictionary.

• noun The bloodroot, Sanguinaria Canadensis: called red puccoon. See bloodroot, 2.
• noun One of three or four American species of Lithospermum, with bright golden-yellow nearly salver-shaped flowers, and hairy surfaces.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Bot.) Any one of several plants yielding a red pigment which is used by the North American Indians, as the bloodroot and two species of Lithospermum (Lithospermum hirtum, and Lithospermum canescens); also, the pigment itself.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun botany Any one of several plants yielding a red pigment which is used by the North American Indians, such as the bloodroot and two species of Lithospermum (L. hirtum and L. canescens).
• noun The red pigment (dye obtained from these plants.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun perennial plant of eastern North America having hairy foliage yielding a red or yellow pigment
• noun perennial woodland native of North America having a red root and red sap and bearing a solitary lobed leaf and white flower in early spring and having acrid emetic properties; rootstock used as a stimulant and expectorant