Species Identification

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

AttributeThe current selection is Penstemon_distans
ClassificationPenstemon Penstemon Cristati
GeneralWidely-spaced Penstemon The specific epithet “distans” refers to widely spaced nodes between flower clusters. Blooms: May to early June.
AntherReaching the orifice to slightly extending, straight with a slightly recurved tip, densely hairy to near the base, fertile stamens included in the throat.
StaminodeRemain parallel, 1.4-1.8 mm long, opening the full length and across the connective, but not flattened, smooth except for nipple-like teeth at cell edges.
LeavesOf 2 types; lower leaves to 14 cm (5 ½”) long & 1/7-1/10 as wide, upper leaves to 4 cm (1 ½”) long & ½ as wide, edges obscurely toothed or entire, linear-oblanceolate, tapered to a sometimes elongated petiole (stem) ascending to spreading; the middle to upper stems leaves 2.5-4 mm (1-1 ½”) long, 1-3 mm wide, linear to narrowly lanceolate, broadest at the stemless end and sometimes subcordate-clasping (almost heart-shaped) base, spreading at nearly right angles to the stem.
StemsPerennial 3-6 dm (12-24”) tall, stems bare-looking, sterile stems short and bearing crowded leaves; flowering stems erect to ascending, herbage puberulent (fuzzy), the hairs becoming glandular on upper stems.
InflorescenseThyrse 13-30 cm (5-12”) long of 6-10 widely spaced verticillasters, cyme 1-2 flowered, the axis, stems and calyces glandular-pubescent (sticky-fuzz) with whitish hairs.
Corolla16-20 mm (to Ύ”) long, blue to violet, expanded abruptly, bellied beneath, lobes spreading, glandular-pubescent externally, throat 2-ridged at orifice, palate pale-yellow to whitish bearded, upper lip erect and lower one projecting.
Flower Color
Calyx4-7 mm (1/4”) long, segments lanceolate, acute to obtuse, more or less straight, the edges herbaceous.
HabitatLocally common to frequent on limestone-gravel slopes among pinyon-juniper vegetation, around 1500 m (5000’) elev.
RangeEndemic to the southeast end of Shivwits Plateau, Mohave Co., AZ.