Download Seed: The seeds of slender beardtongue are brown and very tiny, 0.6-0.8 mm long. (58 KB)
Download Seedling: One month old seedling grown in research greenhouse at SDSU. (45 KB)
Download Vegetative: The 3-9 cm long leaves are entire to sharply toothed. (70 KB)
Download Flowering: Slender beardtongue flowers in a narrow panicle. (54 KB)
Download Fruiting: The seeds are located inside capsules. (94 KB)
Download Research garden: First seasons growth in research garden near SDSU. (96 KB)
Slender beardtongue, Lilac Penstemon
Penstemon gracilis is a(n) perennial herbaceous, which grows 2 dm to 5 dm in height. This species is commonly found sandy or gravelly soil in prairies, valleys, and at lover elevations in mountains. The leaves are opposite. Penstemon gracilis has pale blue lavender flowers that bloom from May to August.