Penstemon ammophilus

N. H. Holmgren & L. M. Shultz

Brittonia 34: 381, fig. 1. 1982.

Common names: Canaan Mountain beardtongue
EndemicConservation concern
Treatment appears in FNA Volume 17. Treatment on page 161. Mentioned on page 157, 162.

Stems decumbent to ascending, 5–26 cm, usually ± fistulose, glutinous and covered with sand, not glaucous. Leaves basal and cauline, not leathery, glutinous and covered with sand, not glaucous; basal and proximal cauline 18–80 × 4–15 mm, blade oblanceolate, base tapered, margins entire, crisped, apex obtuse to acute; cauline 2–5 pairs, sessile, 15–75 × 2–8 mm, blade oblanceolate to lanceolate, base tapered to truncate, margins crisped, apex rounded or obtuse to acute. Thyrses continuous, cylindric, 4–15 cm, axis glutinous and covered with sand, verticillasters 4–10, cymes 1–6-flowered, 2 per node; proximal bracts lanceolate, 14–45 × 2–5 (–8) mm; peduncles and pedicels glutinous and covered with sand. Flowers: calyx lobes lanceolate, 5–6.5 × 1–2 mm, glutinous and covered with sand; corolla lavender to blue-lavender, with violet nectar guides, weakly ventricose, 14–17 mm, glabrous externally, usually glutinous and covered with sand distally, especially on lobes, glabrous internally, tube 5–6 mm, throat gradually inflated, not constricted at orifice, 5–6 mm diam., slightly 2-ridged abaxially; stamens: longer pair reaching orifice, pollen-sacs opposite, navicular, 0.9–1.4 mm, dehiscing completely or incompletely, connective splitting or not, sides glabrous, sutures papillate; staminode: 8–9 mm, included, 0.3–0.5 mm diam., tip straight, distal 4–5 mm sparsely papillate, papillae violet, to 0.2 mm; style 10–12 mm. Capsules 3.5–6.5 mm.


Phenology: Flowering May–Jun.
Habitat: Sand dunes, ponderosa pine forests, mixed shrublands.
Elevation: 1800–2200 m.

Discussion

Penstemon ammophilus is known from Garfield, Kane, and Washington counties. Populations occur on aeolian sand, derived from the Navajo Sandstone. The fistulose stems of P. ammophilus are unique in Penstemon.

Selected References

None.

Lower Taxa

None.

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

... more about "Penstemon ammophilus"
obtuse +  and acute +
Craig C. Freeman +
N. H. Holmgren & L. M. Shultz +
glutinous +
hairy +, puberulent +, glandular-pubescent +  and glabrous +
alternate +, opposite +, whorled +, helical +  and subopposite +
tapered;truncate +
Penstemon +
oblanceolate;lanceolate +
not +  and leathery +
short-tubular +  and short-campanulate +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Canaan Mountain beardtongue +
not personate +, weakly bilabiate +  and strongly bilabiate +
white +  and pink lavender blue violet or purple +
lavender to blue-lavender +
ventricose +
ventricose-ampliate +
1.4 cm14 mm <br />0.014 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
1-6-flowered +
scale-like +  and not needlelike +
drupe-like +
1800–2200 m. +
curved +  and straight +
1 +  and 4 +
Sand dunes, ponderosa pine forests, mixed shrublands. +
0 cm0 mm <br />0 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
membranous +
terminal +  and axillary +
glutinous +
persistent +  and deciduous +
basal +  and cauline +
not glaucous +
not leathery +
orbiculate;linear;orbiculate;linear;truncate;oblanceolate;obovate;oblong;elliptic;round;lanceolate;ovate +
glutinous +
puberulent +, glandular-pubescent +  and glabrous +
axile +  and parietal +
basal +, apical +  and superior +
tenuinucellate +, unitegmic +  and hemitropous +
campylotropous +, hemianatropous +  and anatropous +
0 cm0 mm <br />0 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
spreading +, erect +  and ascending +
spreading;erect;ascending +
5 +  and 4 +
Flowering May–Jun. +
sigmoid +  and navicular-sigmoid +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
1/5 +  and 1/3 +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
1.4 cm14 mm <br />0.014 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
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 +
Endemic +  and Conservation concern +
exserted +  and included +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (?) +  and 0.9 cm9 mm <br />0.009 m <br /> (?) +
short-petiolate +  and petiolate +
glutinous +
climbing +  and scrambling +
sprawling +, creeping +  and prostrate +
decumbent;ascending +
cauline +, proximal +  and basal +
not glaucous +
fistulose +
reduced +
5 cm50 mm <br />0.05 m <br /> (26 cm260 mm <br />0.26 m <br />) +
not +  and leathery +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
papillate +
denticulate +
Penstemon subg. Habroanthus +
Penstemon ammophilus +
Penstemon sect. Glabri +
species +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
2-ridged +  and inflated +
not constricted +
cylindric +
4 cm40 mm <br />0.04 m <br /> (15 cm150 mm <br />0.15 m <br />) +
straight +
papillate +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
smooth +  and papillate +
0.01 cm0.1 mm <br />1.0e-4 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 /> (0.6 cm6 mm <br />0.006 m <br />) +
petiolate +  and sessile +
cauline +  and proximal +