Hairy, or True, or Twin-flowered Solomon's Seal polygonatum biflorum Flowers-Whitish or yellowish green, tubular, bell-shaped, 1 to 4, but usually 2, drooping on slender peduncles from leaf axils.
"Wild Flowers Worth Knowing"
Neltje Blanchan et al
The names Convallaria polygonatum signify "growth in a valley," and "many jointed."
"Herbal Simples Approved for Modern Uses of Cure"
William Thomas Fernie