Flora of North America species comparison

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Penstemon angustifolius var. dulcis

Penstemon angustifolius var. caudatus
Photo is of parent taxon

broadbeard beardtongue, sweet beardtongue
Photo is of parent taxon

broadbeard beardtongue
Stems

27–45 cm, glabrous.

(10–)15–60(–65) cm, glabrous, rarely scabrous.
Cauline leaves

5–8 pairs, blade lanceolate to linear.

3–8 pairs, blade ovate to lanceolate.
Thyrses

proximal bracts ovate to lanceolate.

proximal bracts ovate to lanceolate.
Flowers

corolla pink, 13–17 mm.

corolla blue, rarely lavender or pink, 13–20(–22) mm.
2n

= 16.

Penstemon angustifolius var. dulcis

Penstemon angustifolius var. caudatus
Phenology Flowering May–Jun. Flowering May–Jun.
Habitat Sand dunes, sagebrush, saltbush, juniper communities. Sandy or gravelly soils, shortgrass prairies, sagebrush shrublands.
Elevation 1400–1700 m. (4600–5600 ft.) 1200–2600 m. (3900–8500 ft.)
Distribution
from FNA
UT
[BONAP county map]
from FNA
CO; KS; NE; NM; OK; SD; WY
[BONAP county map]
Discussion

Variety dulcis is known from Juab and Millard counties.

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

Variety caudatus is known from the southwestern Great Plains. While mostly distinct in the southern and central parts of its range, the variety passes into var. angustifolius in northeastern Colorado and western Nebraska.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 17, p. 115. FNA vol. 17, p. 115.
Parent taxa Plantaginaceae > Penstemon > subg. Penstemon > sect. Coerulei > Penstemon angustifolius Plantaginaceae > Penstemon > subg. Penstemon > sect. Coerulei > Penstemon angustifolius
Sibling taxa
P. angustifolius var. angustifolius, P. angustifolius var. caudatus, P. angustifolius var. venosus, P. angustifolius var. vernalensis
P. angustifolius var. angustifolius, P. angustifolius var. dulcis, P. angustifolius var. venosus, P. angustifolius var. vernalensis
Synonyms P. caudatus
Name authority Neese: Great Basin Naturalist 46: 459. (1986) (A. Heller) Rydberg: Bull. Torrey Bot. Club 33: 151. (1906) — (as Pentstemon)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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