Species Identification

Interested in the identification of penstemons? Please select a species then click on submit:

Attribute	The current selection is Penstemon_arkansanus
Classification	Penstemon Penstemon Penstemon Penstemon
General	Arkansas Penstemon Sometimes it is considered synonymous with P. pallidus. Bloom: Begins mid-May and has a long blooming season.
Anther	Open end-to-end narrowly, boat-shape, cells spread apart, exserted beyond orifice.
Staminode	bearded most of its length, or with long tuft at tip, exserted beyond orifice.
Leaves	Basal leaves to 8 cm (3”) long, & 1/6 as wide present at blooming, cauline leaves to 5 cm (2”) long and 1/3 as wide.
Stems	2.5-6 dm (10-24”) tall, herbage fuzzy, and half the average height of other species in this subsection penstemon.
Inflorescense	Cyme 3-9 cm (1 ¼”-3 ½”) long, 3-15 flowered in open panicles.
Corolla	Small, 15-18 mm (1/2-3/4”) long, broadly flattened and expanded moderately from long tube (1/2 length of corolla) white or sometimes violet with violet guidelines in throat, mouth open moderately wide.
Flower Color
Calyx	2-4 mm (1/8”) long.
Habitat	Shale and sandstone soils and woods in uplands fields and woodlands at low elevations.
Range	Arkansas, Eastern OK, w and c AR, sw MO, e TX.