Species Identification

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

AttributeThe current selection is Penstemon_radicosus
ClassificationPenstemon Penstemon Penstemon Humiles
GeneralMatroot Penstemon Stems: Herbaceous perennial 2-4 dm (8-16) tall, with poorly developed or no basal leaves; stems erect or ascending, clustered on a woody root base; herbage retrorsely (backwards) spreading-puberulent (furry). Blooms: May and June.
Anther0.8-1.3 mm long, opening full length, not flattened, smooth except for nipple-toothed edges.
StaminodeIncluded, sparsely pillose with dense tuft at tip.
Leavesnearly all cauline 3-6 cm (1 -2 ) long, 3-10 mm wide, narrowly lanceolate to lanceolate; entire, slightly revolute-creased (rolled backwards with a crease).
StemsHerbaceous perennial 2-4 dm (8-16) tall, with poorly developed or no basal leaves; stems erect or ascending, clustered on a woody root base; herbage retrorsely (backwards) spreading-puberulent (furry).
InflorescenseThyrse relatively loosely branched, cymes 2-4 flowered, glandular-pubescent (sticky-hairy).
Corolla17-23 mm (>5/8) long, tubular-funnelform (tube widening to funnel or bell form), tube blue-violet on top and white beneath with dark-blue lips, projecting lower lip, glandular-pubescent externally, palate sparsely bearded.
Flower Color
Calyx5-8 mm (1/4-1/2) long, segments narrowly lanceolate to lanceolate, acuminate tips, glandular or viscid-pilose (long, straight, soft, spreading, sticky hairs), margin edges thin and sometimes ragged.
HabitatDry, exposed slopes with sagebrush, snowberry, pinyon pine, and juniper, 1400-2300 M (4700-7700).
RangeWidespread through intermountain basin: Elko Co. nc and ne NV, s and c ID, n UT, sw MT, w WY and n CO.