Interested in the identification of penstemons? Please select a species then click on submit:
| Attribute | The current selection is Penstemon_caespitosus |
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| Classification | Penstemon
Penstemon Ericopsis Caespitosi |
| General | Mat Penstemon
Blooms: May to August. |
| Anther | 0.7-1.2 mm, opening the full length, sometimes flat in var. caespitosus, smooth except for the nipple-toothed edged cells. |
| Staminode | Golden-yellow-bearded, reaching the orifice, fertile stamens more or less exserted. |
| Leaves | 0.4-1 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. |
| Stems | Low, 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. |
| Inflorescense | Thyrse subspicate (almost spike-like), 1-flowered cymes, glandular-pubescent (sticky-hairy). |
| Corolla | 10-17 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 | |
| Calyx | 4-6.5 mm (to ¼”) long, segments linear to linear-lanceolate with recurved tips, retrorse-pubescent (backwards pointing down) with some sticky hairs interspersed. |
| Habitat | Sandy or clay soils in sagebrush, juniper, pinyon-juniper, oak and ponderosa pine communities, 1500-2600m (5000-8600’). |
| Range | Southwest 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
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