Penstemon haydenii

S. Watson

Bot. Gaz. 16: 311. 1891.

Common names: Blowout beardtongue
EndemicConservation concern
Treatment appears in FNA Volume 17. Treatment on page 119. Mentioned on page 111.
Revision as of 18:08, 29 July 2020 by imported>Volume Importer
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Plants: caudex rhizomelike. Stems decumbent to ascending, (15–) 20–48 cm, glabrous. Leaves essentially cauline, basal absent or reduced, glabrous; basal and proximal cauline (25–) 55–130 (–175) × 3–25 mm, blade linear to lanceolate, base tapered, apex acute to acuminate; cauline 2–10 pairs, sessile, 60–110 (–120) × 7–30 mm, blade lanceolate to linear, base clasping, apex acuminate to long-acuminate. Thyrses continuous, cylindric, (2–) 6–21 (–34) cm, axis glabrous, verticillasters (2–) 6–10 (–17), cymes 1–8-flowered; proximal bracts ovate, 58–120 × 20–45 mm; peduncles and pedicels glabrous. Flowers: calyx lobes lanceolate to linear, 8–13 × 1–3 mm, margins entire or erose, herbaceous or scarious, glabrous; corolla lavender to bluish, usually with magenta nectar guides, ampliate, 21–28 mm, glabrous externally, glabrous internally, tube 7–9 mm, throat abruptly inflated, 9–11 mm diam., rounded abaxially; stamens included, pollen-sacs opposite, 1.1–2 mm, sutures papillate; staminode 13–16 mm, included, 1.2–3 mm diam., tip recurved, distal 0.1–5 mm sparsely to densely villous, hairs golden yellow, to 1 mm, rarely glabrous; style 13–23 mm. Capsules 8–12 × 5–9 mm. 2n = 16.


Phenology: Flowering May–Jul(–Sep).
Habitat: Blowouts in sand dunes.
Elevation: 900–2300 m.

Discussion

Penstemon haydenii is known from the Nebraska Sandhills, where extant populations occur in Box Butte, Cherry, Garden, Hooker, Morrill, and Sheridan counties. Historic populations occurred in Thomas County (D. M. Sutherland 1988).

Penstemon haydenii was discovered in northern Carbon County, Wyoming, in the late 1990s some 300 km west of the nearest Nebraska populations; it might have been collected in Wyoming as early as 1877 (W. Fertig 2001). A morphometric analysis of Nebraska and Wyoming plants revealed differences that could justify recognition of Wyoming populations as a distinct variety (C. C. Freeman 2015). It is listed as endangered by the U.S. Department of the Interior.

Lower Taxa

None.

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

... more about "Penstemon haydenii"
acuminate +  and long-acuminate +
Craig C. Freeman +
S. Watson +
glutinous +
alternate +, opposite +, whorled +, helical +  and subopposite +
tapered +
lanceolate;linear +
not +  and leathery +
lanceolate;linear +
short-tubular +  and short-campanulate +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
11 cm110 mm <br />0.11 m <br /> (12 cm120 mm <br />0.12 m <br />) +
6 cm60 mm <br />0.06 m <br /> (11 cm110 mm <br />0.11 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Blowout beardtongue +
not personate +  and bilabiate +
lavender +  and bluish +
tubular-salverform +, ventricose +  and tubular-funnelform +
ampliate +
2.1 cm21 mm <br />0.021 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
1-8-flowered +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
scale-like +  and not needlelike +
Nebr. +  and Wyo. +
drupe-like +
900–2300 m. +
curved +  and straight +
1 +  and 4 +
Blowouts in sand dunes. +
golden yellow +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
membranous +
terminal +  and axillary +
persistent +  and deciduous +
orbiculate;linear;orbiculate;linear;truncate;oblanceolate;obovate;oblong;elliptic;round;lanceolate;ovate +
erose +  and entire +
glutinous +
toothed +  and entire +
scarious +  and herbaceous +
axile +  and parietal +
basal +, apical +  and superior +
tenuinucellate +, unitegmic +  and hemitropous +
campylotropous +, hemianatropous +  and anatropous +
ascending +  and erect +
ascending;erect +
5 +  and 4 +
Flowering May–Jul(–Sep). +
navicular-sigmoid +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
5.8 cm58 mm <br />0.058 m <br /> (12 cm120 mm <br />0.12 m <br />) +
2 cm20 mm <br />0.02 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
fertig2001a +, freeman2015a +  and sutherland1988a +
minute +
dark-brown +  and brown +
disciform +, angled-elongate +  and angled +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.54 cm5.4 mm <br />0.0054 m <br />) +
Endemic +  and Conservation concern +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
1.3 cm13 mm <br />0.013 m <br /> (?) +  and 1.6 cm16 mm <br />0.016 m <br /> (?) +
short-petiolate +  and petiolate +
15 cm150 mm <br />0.15 m <br /> (20 cm200 mm <br />0.2 m <br />) +
climbing +  and scrambling +
sprawling +, creeping +  and prostrate +
decumbent;ascending +
cauline +, proximal +  and basal +
reduced +
20 cm200 mm <br />0.2 m <br /> (48 cm480 mm <br />0.48 m <br />) +
leathery +
1.3 cm13 mm <br />0.013 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
papillate +
denticulate +
Penstemon haydenii +
Penstemon sect. Coerulei +
species +
0.9 cm9 mm <br />0.009 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
rounded +  and inflated +
not constricted +
21 cm210 mm <br />0.21 m <br /> (34 cm340 mm <br />0.34 m <br />) +
cylindric +
6 cm60 mm <br />0.06 m <br /> (21 cm210 mm <br />0.21 m <br />) +
straight +
gibbous +  and not spurred +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
short-petiolate +  and sessile +
cauline +  and proximal +