Penstemon — 28 species

Penstemon (beardtongue) is a large North American genus of tubular-flowered perennials and subshrubs, ranging from Foxglove beardtongue of eastern woodlands to Scarlet bugler and Rocky Mountain penstemon in western landscapes. All prefer full sun and sharply drained, lean soil; once established they are notably drought-tolerant and suffer in wet or clay soils. Toxicity varies across the genus — most species are considered low-risk, but some Penstemon have been associated with selenium accumulation under certain soil conditions. Check individual species before planting in pet-accessible areas, and consult a vet if ingestion is suspected.