Penstemon glaber var. alpinus

(Torrey) A. Gray

Proc. Amer. Acad. Arts. 6: 60. 1862.

IllustratedEndemic
Basionym: Penstemon alpinus Torrey Ann. Lyceum Nat. Hist. New York 1: 35. 1823
Synonyms: P. alpinus subsp. magnus (Pennell) Penland
Treatment appears in FNA Volume 17. Treatment on page 169. Mentioned on page 168.

Stems glabrous or puberulent proximally. Flowers: calyx lobes ovate, 3.8–9.5 × 1.3–3.3 mm, apex long-acuminate; corolla 24–35 mm, sparsely to moderately white-lanate internally abaxially; staminode apex rounded or bifurcate. 2n = 16.


Phenology: Flowering Jun–Aug(–Sep).
Habitat: Sandy or gravelly slopes and banks in shortgrass prairies, foothills, mountains.
Elevation: 1500–2900 m.

Distribution

Colo., Nebr., N.Mex., Wyo.

Discussion

Variety alpinus occurs in the Front Range of the Rocky Mountains on gravelly, granitic slopes, and roadcuts. The type of Penstemon magnus Pennell, on which P. alpinus subsp. magnus is based, was collected in Jackson County, Colorado. The specimen is in poor condition but has calyx lobes to 8 mm with apices short- to long-acuminate; it is tentatively assigned here.

Selected References

None.

Lower Taxa

None.

"/4+timescorollathroat" is not declared as a valid unit of measurement for this property.

long-acuminate +
Craig C. Freeman +
(Torrey) A. Gray +
puberulent +  and glabrous +
alternate +, opposite +, whorled +, helical +  and subopposite +
truncate;cordate +
Penstemon alpinus +
lanceolate;obovate;oblanceolate or lanceolate +
not +  and leathery +
3.8mm;9.5mm +
puberulent +  and glabrous +
1.3mm;3.3mm +
short-tubular +  and short-campanulate +
1 cm10 mm <br />0.01 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
12 cm120 mm <br />0.12 m <br /> (15 cm150 mm <br />0.15 m <br />) +
3.5 cm35 mm <br />0.035 m <br /> (4.3 cm43 mm <br />0.043 m <br />) +
2.7 cm27 mm <br />0.027 m <br /> (12 cm120 mm <br />0.12 m <br />) +
2.2 cm22 mm <br />0.022 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
not personate +, weakly bilabiate +  and strongly bilabiate +
blue +  and violet +
white-lanate +
ventricose +
ventricose-ampliate +
2.4 cm24 mm <br />0.024 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
2-4-flowered +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
scale-like +  and not needlelike +
Colo. +, Nebr. +, N.Mex. +  and Wyo. +
drupe-like +
1500–2900 m. +
curved +  and straight +
1 +  and 4 +
Sandy or gravelly slopes and banks in shortgrass prairies, foothills, mountains. +
pale-yellow +, tan +  and white +
0 cm0 mm <br />0 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
membranous +
terminal +  and axillary +
persistent +  and deciduous +
cauline +  and basal +
orbiculate;linear;orbiculate;linear;truncate;oblanceolate;obovate;oblong;elliptic;round;lanceolate;ovate +
glutinous +
puberulent +, glandular-pubescent +  and glabrous +
undulate +
axile +  and parietal +
basal +, apical +  and superior +
tenuinucellate +, unitegmic +  and hemitropous +
campylotropous +, hemianatropous +  and anatropous +
0 cm0 mm <br />0 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
spreading +, erect +  and ascending +
puberulent +  and glabrous +
0.4 cm4 mm <br />0.004 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
spreading;erect;ascending +
puberulent +  and glabrous +
0 cm0 mm <br />0 m <br /> (7.1 cm71 mm <br />0.071 m <br />) +
5 +  and 4 +
Flowering Jun–Aug(–Sep). +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
sigmoid +  and navicular-sigmoid +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
1/5 +  and 1/3 +
1.4 cm14 mm <br />0.014 m <br /> (10 cm100 mm <br />0.1 m <br />) +
ovate +  and lanceolate +
0.2 cm2 mm <br />0.002 m <br /> (3.6 cm36 mm <br />0.036 m <br />) +
Proc. Amer. Acad. Arts. +
minute +
tan +  and brown or dark-brown +
angled +  and angled-elongate +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
papillate +
Illustrated +  and Endemic +
bifurcate +  and rounded +
1.5 cm15 mm <br />0.015 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
exserted +  and included +
1.8 cm18 mm <br />0.018 m <br /> (?) +  and 2.2 cm22 mm <br />0.022 m <br /> (?) +
short-petiolate +  and petiolate +
65 cm650 mm <br />0.65 m <br /> (80 cm800 mm <br />0.8 m <br />) +
glutinous +
climbing +  and scrambling +
sprawling +, creeping +  and prostrate +
puberulent +  and glabrous +
reduced +
50 cm500 mm <br />0.5 m <br /> (65 cm650 mm <br />0.65 m <br />) +
not leathery +
1.8 cm18 mm <br />0.018 m <br /> (2 cm20 mm <br />0.02 m <br />) +
papillate +
denticulate +
P. alpinus subsp. magnus +
Penstemon glaber var. alpinus +
Penstemon glaber +
variety +
0.8 cm8 mm <br />0.008 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
rounded +  and inflated +
constricted +
secund +  and continuous +
26 cm260 mm <br />0.26 m <br /> (30 cm300 mm <br />0.3 m <br />) +
cylindric +
6 cm60 mm <br />0.06 m <br /> (26 cm260 mm <br />0.26 m <br />) +
straight +
rounded +  and distinctly bifurcate +
smooth +  and papillate +
0 cm0 mm <br />0 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
gibbous +  and not spurred +
0.5 cm5 mm <br />0.005 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
petiolate +  and sessile +
cauline +  and proximal +