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Photo is of parent taxon

broadbeard beardtongue, sweet beardtongue

broadbeard beardtongue, narrow-leaf beardtongue

Stems

27–45 cm, glabrous.

ascending to erect, (6–)15–45(–65) cm, glabrous or scabrous.

Leaves

basal and cauline, basal not reduced, glabrous, sometimes scabrous;

basal and proximal cauline (25–)40–90 × 2–18 mm, blade spatulate to oblanceolate or linear, base tapered, apex rounded to obtuse or acute;

cauline 2–8 pairs, sessile, 18–113 × 2–24(–40) mm, blade ovate to lanceolate or linear, base tapered to cordate-clasping, apex acute to acuminate.

Cauline leaves

5–8 pairs, blade lanceolate to linear.

Thyrses

proximal bracts ovate to lanceolate.

continuous or interrupted, cylindric, (2–)5–30(–37) cm, axis glabrous, rarely scabrous, verticillasters (3–)5–15(–26), cymes (2–)4–8(–10)-flowered;

proximal bracts ovate to lanceolate or linear, (3–)12–98 × (1–)2–28 mm;

peduncles and pedicels glabrous or scabrous, peduncles to 3 mm.

Flowers

corolla pink, 13–17 mm.

calyx lobes ovate to lanceolate, 4–8 × 1–2.5 mm, margins entire or erose, broadly scarious, glabrous or scabrous;

corolla lavender, blue, or pink, with violet or reddish purple nectar guides, tubular-funnelform, 13–20(–22) mm, glabrous externally, sparsely white-pubescent internally abaxially or glabrous, tube 6–8 mm, throat gradually inflated, 4–6 mm diam., rounded abaxially;

stamens included or longer pair reaching orifice, pollen sacs opposite, (0.9–)1.1–1.5 mm, sutures papillate;

staminode 8–10 mm, reaching orifice, 0.9–1.2 mm diam., tip recurved, distal 4–6 mm sparsely villous, hairs golden yellow, to 1 mm, hairs on proximal part of staminode mostly along margins;

style 8–12 mm.

Capsules

9–15 × 5–7 mm.

Penstemon angustifolius var. dulcis

Penstemon angustifolius

Phenology Flowering May–Jun.
Habitat Sand dunes, sagebrush, saltbush, juniper communities.
Elevation 1400–1700 m. (4600–5600 ft.)
Distribution
from FNA
UT
[BONAP county map]
from FNA
AZ; CO; KS; MT; ND; NE; NM; OK; SD; UT; WY
[WildflowerSearch map]
[BONAP county map]
Discussion

Variety dulcis is known from Juab and Millard counties.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Varieties 5 (5 in the flora).

Penstemon angustifolius comprises five varieties: two widespread in the west-central Great Plains and three with more limited, allopatric ranges.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Corollas pink; cauline leaf blades lanceolate to linear; Juab and Millard counties, Utah.
var. dulcis
1. Corollas blue or lavender, rarely pink; cauline leaf blades ovate to lanceolate or linear (if corollas pink, leaf blades broader or plants not of Juab or Millard counties, Utah); Arizona, Colorado, Kansas, Montana, Nebraska, New Mexico, North Dakota, Oklahoma, South Dakota, Utah, Wyoming.
→ 2
2. Cauline leaf blades and proximal bracts lanceolate to linear.
→ 3
3. Stems glabrous or scabrous; corollas 14–18 mm; cauline leaves 2–5(or 6) pairs; stems (6–)10–30 cm; Colorado, Montana, Nebraska, North Dakota, South Dakota, Wyoming.
var. angustifolius
3. Stems glabrous, rarely scabrous; corollas (14–)18–20(–22) mm; cauline leaves 4–7 pairs; stems (8–)15–45 cm; Colorado, Utah.
var. vernalensis
2. Cauline leaf blades and proximal bracts ovate to lanceolate.
→ 4
4. Corollas 13–20(–22) mm, blue, rarely lavender or pink; Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Wyoming.
var. caudatus
4. Corollas 14–17 mm, blue to lavender or pink; Arizona, Colorado, New Mexico, Utah.
var. venosus
Source FNA vol. 17, p. 115. FNA vol. 17, p. 113.
Parent taxa Plantaginaceae > Penstemon > subg. Penstemon > sect. Coerulei > Penstemon angustifolius Plantaginaceae > Penstemon > subg. Penstemon > sect. Coerulei
Sibling taxa
P. angustifolius var. angustifolius, P. angustifolius var. caudatus, P. angustifolius var. venosus, P. angustifolius var. vernalensis
P. abietinus, P. absarokensis, P. acaulis, P. acuminatus, P. alamosensis, P. albertinus, P. albidus, P. albomarginatus, P. ambiguus, P. ammophilus, P. anguineus, P. arenarius, P. arenicola, P. aridus, P. arkansanus, P. attenuatus, P. atwoodii, P. auriberbis, P. australis, P. azureus, P. baccharifolius, P. barbatus, P. barnebyi, P. barrettiae, P. bicolor, P. bleaklyi, P. bracteatus, P. breviculus, P. brevisepalus, P. buckleyi, P. caesius, P. caespitosus, P. calcareus, P. californicus, P. calycosus, P. canescens, P. cardinalis, P. cardwellii, P. carnosus, P. caryi, P. centranthifolius, P. cinicola, P. clevelandii, P. clutei, P. cobaea, P. comarrhenus, P. compactus, P. concinnus, P. confertus, P. confusus, P. crandallii, P. cusickii, P. cyananthus, P. cyaneus, P. cyanocaulis, P. cyathophorus, P. dasyphyllus, P. davidsonii, P. deamii, P. deaveri, P. debilis, P. degeneri, P. deustus, P. digitalis, P. diphyllus, P. discolor, P. dissectus, P. distans, P. dolius, P. duchesnensis, P. eatonii, P. elegantulus, P. ellipticus, P. eriantherus, P. euglaucus, P. fendleri, P. filiformis, P. flavescens, P. floribundus, P. floridus, P. flowersii, P. franklinii, P. fremontii, P. fruticiformis, P. fruticosus, P. gairdneri, P. gibbensii, P. glaber, P. glandulosus, P. glaucinus, P. globosus, P. goodrichii, P. gormanii, P. gracilentus, P. gracilis, P. grahamii, P. grandiflorus, P. griffinii, P. grinnellii, P. guadalupensis, P. hallii, P. harbourii, P. harringtonii, P. havardii, P. haydenii, P. heterodoxus, P. heterophyllus, P. hirsutus, P. humilis, P. idahoensis, P. immanifestus, P. incertus, P. inflatus, P. jamesii, P. janishiae, P. kingii, P. kralii, P. labrosus, P. laetus, P. laevigatus, P. laevis, P. lanceolatus, P. laricifolius, P. laxiflorus, P. laxus, P. leiophyllus, P. lemhiensis, P. lentus, P. leonardii, P. linarioides, P. longiflorus, P. lyallii, P. marcusii, P. mensarum, P. metcalfei, P. miser, P. moffatii, P. monoensis, P. montanus, P. moriahensis, P. mucronatus, P. multiflorus, P. murrayanus, P. nanus, P. navajoa, P. neomexicanus, P. neotericus, P. newberryi, P. nitidus, P. nudiflorus, P. oklahomensis, P. oliganthus, P. ophianthus, P. osterhoutii, P. ovatus, P. pachyphyllus, P. pahutensis, P. pallidus, P. palmeri, P. papillatus, P. parryi, P. parvulus, P. parvus, P. patens, P. payettensis, P. paysoniorum, P. peckii, P. penlandii, P. pennellianus, P. perpulcher, P. personatus, P. petiolatus, P. pinifolius, P. pinorum, P. platyphyllus, P. pratensis, P. procerus, P. pruinosus, P. pseudoputus, P. pseudospectabilis, P. pudicus, P. pumilus, P. purpusii, P. putus, P. radicosus, P. rattanii, P. retrorsus, P. rhizomatosus, P. richardsonii, P. roezlii, P. rostriflorus, P. rubicundus, P. rupicola, P. rydbergii, P. saxosorum, P. scapoides, P. scariosus, P. secundiflorus, P. seorsus, P. sepalulus, P. serrulatus, P. smallii, P. spatulatus, P. speciosus, P. spectabilis, P. stenophyllus, P. stephensii, P. strictiformis, P. strictus, P. subglaber, P. subserratus, P. subulatus, P. sudans, P. superbus, P. tenuiflorus, P. tenuis, P. teucrioides, P. thompsoniae, P. thurberi, P. tidestromii, P. tiehmii, P. tracyi, P. triflorus, P. triphyllus, P. tubaeflorus, P. uintahensis, P. utahensis, P. venustus, P. virens, P. virgatus, P. wardii, P. washingtonensis, P. watsonii, P. whippleanus, P. wilcoxii, P. wrightii, P. xylus, P. yampaënsis
Subordinate taxa
P. angustifolius var. angustifolius, P. angustifolius var. caudatus, P. angustifolius var. dulcis, P. angustifolius var. venosus, P. angustifolius var. vernalensis
Name authority Neese: Great Basin Naturalist 46: 459. (1986) Pursh: Fl. Amer. Sept. 2: 738. (1813) — (as Pentstemon angustifolia)
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