Plate XXXIV.
Fig. 1. Gentiana Catesbaei.
Fig. 2. A flower with the corolla drawn open to show the inner plicae.
Fig. 3. Stamens and pistil in their natural situation.
Fig. 4. Stamens separate.
Fig. 5. Pistil.

This image is from Gentiana catesbaei. Blue Gentian. in American Medical Botany, Bigelow, 1817-1821.
(used in Rafinesque)