Penstemon dissectus

Elliott

Sketch Bot. S. Carolina 2: 129. 1822.

Common names: Cut-leaf beardtongue
IllustratedEndemicConservation concern
Treatment appears in FNA Volume 17. Treatment on page 144. Mentioned on page 82, 139.

Stems 32–75 cm. Leaves: cauline 7–11 pairs, 16–50 × 10–28 mm, base tapered to truncate, apex obtuse to acute. Thyrses 6–18 cm, verticillasters 2–4, cymes (1 or) 2 or 3 (or 4) -flowered; proximal bracts ovate to lanceolate, 4–10 × 3–10 mm; peduncles and pedicels retrorsely hairy. Flowers: calyx lobes ovate to lanceolate, 3–5 × 1.3–2.2 mm; corolla with lavender or violet nectar guides, 20–25 mm, sparsely white-lanate internally abaxially, tube 6–7 mm, throat 8–10 mm diam.; pollen-sacs 1.1–1.4 mm; staminode 17–19 mm, distal 2–4 mm sparsely villous, hairs white, to 2 mm; style 14–15 mm. Capsules 7–9 × 4–7 mm.


Phenology: Flowering Apr–May.
Habitat: Open, mixed oak-pine forests, rock outcrops.
Elevation: 10–50 m.

Discussion

Penstemon dissectus is known from approximately 16 counties in the Coastal Plain. The species is unique in Penstemon in having margins of cauline leaves one- or two-pinnatifid. Basal leaves, which usually wither by anthesis, have entire margins.

Selected References

None.

Lower Taxa

None.

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

... more about "Penstemon dissectus"
obtuse +  and acute +
Craig C. Freeman +
Elliott +
puberulent +
alternate +, opposite +, whorled +, helical +  and subopposite +
not glaucous +, puberulent +  and glabrous +
not leathery +
tapered;truncate +
Penstemon subg. Bentham +
not +  and leathery +
ovate;lanceolate +
1.3mm;2.2mm +
short-tubular +  and short-campanulate +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
glandular-pubescent +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
sessile +  and short-petiolate +
1.6 cm16 mm <br />0.016 m <br /> (5 cm50 mm <br />0.05 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
Cut-leaf beardtongue +
not personate +  and bilabiate +
lavender +  and violet +
white-lanate +
ventricose +
ventricose-ampliate +  and ampliate +
2 cm20 mm <br />0.02 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
scale-like +  and not needlelike +
drupe-like +
10–50 m. +
curved +  and straight +
1 +  and 4 +
Open, mixed oak-pine forests, rock outcrops. +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
membranous +
terminal +  and axillary +
persistent +  and deciduous +
orbiculate;linear;orbiculate;linear;truncate;oblanceolate;obovate;oblong;elliptic;round;lanceolate;ovate +
erose +  and entire +
glandular-pubescent +
deeply pinnatifid +  and nearly pinnatisect +
violet +  and lavender +
axile +  and parietal +
basal +, apical +  and superior +
tenuinucellate +, unitegmic +  and hemitropous +
campylotropous +, hemianatropous +  and anatropous +
5 +  and 4 +
Flowering Apr–May. +
navicular-sigmoid +
indehiscent +  and dehiscing +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
1/5 +  and 1/4 +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
ovate +  and lanceolate +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Sketch Bot. S. Carolina +
minute +
dark-brown +  and black +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
Illustrated +, Endemic +  and Conservation concern +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
1.7 cm17 mm <br />0.017 m <br /> (?) +  and 1.9 cm19 mm <br />0.019 m <br /> (?) +
subalternate +, alternate +, whorled +  and opposite +
climbing +  and scrambling +
sprawling +, creeping +  and prostrate +
decumbent;ascending;decumbent;ascending;erect;prostrate +
not glaucous +  and hairy +
32 cm320 mm <br />0.32 m <br /> (75 cm750 mm <br />0.75 m <br />) +
glandular-pubescent +
1.4 cm14 mm <br />0.014 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
papillate +
denticulate +
Penstemon dissectus +
Penstemon sect. Dissecti +
species +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
2-ridged +  and inflated +
not constricted +
cylindric +
6 cm60 mm <br />0.06 m <br /> (18 cm180 mm <br />0.18 m <br />) +
straight +
0 cm0 mm <br />0 m <br /> (0.01 cm0.1 mm <br />1.0e-4 m <br />) +
gibbous +  and not spurred +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +