Species Identification

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

AttributeThe current selection is Penstemon_flavescens
ClassificationPenstemon Penstemon Penstemon Proceri
GeneralPale Yellow Penstemon Blooms: In the summer.
Anther0.7-0.9 mm long, dark purple outside, the sacs opening full length and spreading nearly opposite and boat-shaped.
StaminodeIncluded within the corolla, bearded with stiff golden hairs at the slightly expanded tip.
LeavesBasal leaves 3-12 cm (1 -4 ) long with a narrow petiole (stem) about 1/3 the length, entire, glabrous, deep green and leathery, lanceolate to elliptic; cauline leaves mostly oblong to ovate, sessile or clasping in the inflorescence.
Stems1.5-4 dm (6-16) long, from a mat or tuft of short sterile, leafy stems come a few to many flowering stems, commonly decumbent at the base, glabrous or finely hairy.
InflorescenseA dense thyrse at the crown and often 1 to 3 fairly dense verticillasters below, glabrous.
Corolla12-16 mm (1/2-5/8) long, light yellow or brownish, and modestly inflated in the throat, the palate yellow-bearded and 2-ridged.
Flower Color
Calyx5-9 mm long, the sepals ovate or lanceolate, broadly scarious and markedly ragged on the edges.
HabitatScattered woods or openings, subalpine to alpine
RangeThe Bitterroot Mts. of w MT to c ID.