From The Collaborative International Dictionary of English v.0.48 :
Puccoon \Puc*coon"\, n. [From the American Indian name.] (Bot.)
Any one of several plants yielding a red pigment which is
used by the North American Indians, as the bloodroot and two
Lithospermum+({Lithospermum+hirtum">species of Lithospermum ({Lithospermum hirtum, and
Lithospermum canescens); also, the pigment itself.
[1913 Webster]
From WordNet (r) 3.0 (2006) :
Lithospermum canescens
n 1: perennial North American plant with greyish hairy foliage
yielding a red or yellow pigment [syn: hoary puccoon,
Indian paint, Lithospermum canescens]