LARGE BEARDTONGUE

LARGE BEARDTONGUE

Penstemon grandiflorus
FIGWORT FAMILY (Scrophulariaceae)

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This native perennial with its smooth, waxy, bluish-green stem and leaves grows from 2-3 feet tall. Opposite, clasping leaves are 1-4 inches long with smooth margins (A,C). Evenly spaced clusters of tubular 1 1/2 Inch flowers arise just above a pair of leaf-like bracts. The flower consists of 5 fused petals which flare at the end into a 2-lobed upper and 3-lobed lower lip (B). Color varies from pale pink or blue (C) to a deep purple with darker nectar lines (B). Like other penstemons, this species has four pollen-bearing stamens which may be seen right along the lower margin of the upper lip in (B) and a single sterile fringed stamen lying along the top of the lower lip, the origin of the common name “beardtongue.” The golden-yellow, fringed tip is fairly inconspicuous in this species. The stem, bearing rounded seed capsules with pointed tips, often persists through the winter (D,E).

Grows in sandy or well-drained prairie uplands, flowering in May and June. At Neale Woods, Large Beardtongue is common in the Jonas Prairie restoration and uncommon in Knull Prairie.

Penstemon is derived from two Greek words meaning 5 stamens. Other common names include Large-Flowered Beardtongue and Shell-Leaf Penstemon.

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