Species Identification

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AttributeThe current selection is Penstemon_caespitosus
ClassificationPenstemon Penstemon Ericopsis Caespitosi
GeneralMat Penstemon Blooms: May to August.
Anther0.7-1.2 mm, opening the full length, sometimes flat in var. caespitosus, smooth except for the nipple-toothed edged cells.
StaminodeGolden-yellow-bearded, reaching the orifice, fertile stamens more or less exserted.
Leaves0.4-1 cm (<1/4 3/8) long & 1-3 mm wide, linear to obovate or spatulate, entire, acute or usually with sharp mucronate tips, tapering to a stemmed base.
StemsLow, cespitose, mat-forming perennial, leafy flowering stems prostrate, usually turning up at the nodes, 2-8 cm (3/4-3) long, the old stems woody, branched, rooting at the nodes.
InflorescenseThyrse subspicate (almost spike-like), 1-flowered cymes, glandular-pubescent (sticky-hairy).
Corolla10-17 mm (3/8-5/8) long, blue lobes, tube and throat lavender externally and white within with red-violet lines, gradually widening at tip to somewhat belled throat flat and strongly 2-ridged above and bulged beneath, upper lip arched back, the lower projecting, sparsely glandular-pubescent on the outer surface, the palate pale yellow-bearded.
Flower Color
Calyx4-6.5 mm (to ) long, segments linear to linear-lanceolate with recurved tips, retrorse-pubescent (backwards pointing down) with some sticky hairs interspersed.
HabitatSandy or clay soils in sagebrush, juniper, pinyon-juniper, oak and ponderosa pine communities, 1500-2600m (5000-8600).
RangeSouthwest and sc WY and nw CO, s through ne UT and UT Plateaus to the Grand canyon and Painted Desert regions of n AZ; a disjunct in the Confusion Range, Millard Co., Bryce Cyn. NP. UT. 1.Anther cells 0.6-0.9 mm long 2.var. caespitosus: Leaves narrowly oblanceolate; anthers becoming 0.6-0.8 mm long and opened flat, sw and sc WY, nw CO and ne UT and a disjunct station in the Confusion Range, Millard Co. UT. 2. var. perbrevis (Pennell) N. Holmgren: Leaves obovate or spatulate; anther 0.8-0.9 mm long, not becoming flat: Tavaputs, Wasatch and Aquarius plateaus. 1.Anther cells 0.9-1.2 mm long, leaves linear-oblanceolate: Paunsaugunt Plateau (Red and Bryce Cyn area) UT, s to Painted Desert and Grand Canyon regions, n AZ: var. desertipicti (A. Nels.) N. Holmgren