Angiosperms: Dicotyledons
Scrophulariaceae
Figwort Family
Large-flowered beardtonguePenstemon grandiflorus Nutt.
- Stem: perennial; 2’ to 3’ tall; unbranched; smooth with waxy, bluish cast on stem and leaves.
- Leaves: opposite; lower round-oval, 2” by 1 3/8”, upper slightly chordate, 1” by 1”; sessile to somewhat clasping; smooth above and below.
- Inflorescence: raceme with two flowers per node; opposite bracts at each node, 5/8” long, oval.
- Flowers: corolla purple to lavender, two-lipped, narrow, funnel-shaped, 1 3/8” long; calyx five-lobed, 5/16” long; flowering from late May to mid-June.
- Fruits: capsules; 7/8” long, widest near the base, opening at the tip by four segments; seeds squarish, 3/32” long; fruiting begins in early June.
- Habitat: common on Loess Hills prairies in western Iowa; very infrequent elsewhere on dry, sandy prairies and stabilized sand dunes.
- Bibliography from Biodiversity Heritage Library
- Vascular Plants of Iowa
Can be found in these counties: