The Genus Lithospermum East of the
Cascade Mts.
Puccoon: Lithospermum ruderale
Corn Gromwell, Field Gromwell: Lithospermum
arvense (Synonym: Buglossoides arvensis) - Weedy annuals. Corolla white to bluish-white, the tube 5-8 mm
long and the limb 2-4 mm wide.
Puccoon: Lithospermum ruderale
- Perennials. Corolla yellow or yellowish-green, the tube from 4-7 mm long
and the limb from 8-13 mm wide.
Paul Slichter