D
Dropped
Penstemon breviculus (Narrow-Mouth Penstemon)
Perennial; stems 0.8-2.0 dm tall, erect, or slightly upward-curving, retrorsely puberulent; leaves mostly basal, opposite, entire or rarely few toothed, lanceolate, elliptic, or spatulate, basal leaves somewhat petiolate, stem leaves sessile; inflore...