Species Identification

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

AttributeThe current selection is Penstemon_arkansanus
ClassificationPenstemon Penstemon Penstemon Penstemon
GeneralArkansas Penstemon Sometimes it is considered synonymous with P. pallidus. Bloom: Begins mid-May and has a long blooming season.
AntherOpen end-to-end narrowly, boat-shape, cells spread apart, exserted beyond orifice.
Staminodebearded most of its length, or with long tuft at tip, exserted beyond orifice.
LeavesBasal 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.
Stems2.5-6 dm (10-24) tall, herbage fuzzy, and half the average height of other species in this subsection penstemon.
InflorescenseCyme 3-9 cm (1 -3 ) long, 3-15 flowered in open panicles.
CorollaSmall, 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
Calyx2-4 mm (1/8) long.
HabitatShale and sandstone soils and woods in uplands fields and woodlands at low elevations.
RangeArkansas, Eastern OK, w and c AR, sw MO, e TX.