Penstemon discolor

D. D. Keck

Bull. Torrey Bot. Club 64: 379. 1937.

Common names: Catalina beardtongue
EndemicConservation concern
Treatment appears in FNA Volume 17. Treatment on page 103. Mentioned on page 99.

Stems ascending to erect, 10–35 cm, glabrous or sparsely retrorsely hairy, hairs white, scalelike. Leaves leathery, glabrous, rarely sparsely retrorsely hairy, hairs white, scalelike abaxially, densely puberulent, hairs white, scalelike adaxially; cauline 10–30 pairs, petiolate, 5–18 × 1–1.5 mm, blade oblanceolate to linear, base tapered, apex mucronate. Thyrses continuous or interrupted, ± secund, 2–15 cm, axis glandular-pubescent, verticillasters 5–13, cymes 1–3-flowered, 1 per node; proximal bracts oblanceolate to linear, 5–12 × 0.5–1 mm; peduncles and pedicels ascending to erect, glandular-pubescent. Flowers: calyx lobes ovate to lanceolate, 2.5–3.5 × 1.2–1.8 mm, scarious-margined, glandular-pubescent, hairs pointed; corolla lavender to violet or purple, lined internally abaxially with reddish purple nectar guides, tubular-funnelform, 9–14 mm, densely yellow or whitish lanate internally abaxially, tube 3–5 mm, throat gradually inflated, 3.5–5 mm diam., slightly 2-ridged abaxially; stamens included, filaments glabrous, pollen-sacs opposite, navicular, 0.5–0.8 mm, sutures papillate; staminode 7–8 mm, included or reaching orifice, flattened distally, 0.2–0.4 mm diam., tip straight to recurved, distal 5–6 mm densely pilose, hairs golden yellow, to 1 mm; style 8–11 mm. Capsules 5–8 × 3–4.8 mm.


Phenology: Flowering Jun–Aug.
Habitat: Pinyon-juniper and oak woodlands, granite crevices.
Elevation: 1900–2100 m.

Discussion

Penstemon discolor is known from the Atascosa, Dragoon, Santa Catalina, and Santa Teresa mountains in Cochise, Graham, Pima, and Santa Cruz counties.

Selected References

None.

Lower Taxa

None.

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

... more about "Penstemon discolor"
mucronate +
Craig C. Freeman +
D. D. Keck +
glandular-pubescent +
alternate +, opposite +, whorled +, helical +  and subopposite +
tapered +
Penstemon +
oblanceolate;linear +
not +  and leathery +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
scarious-margined +
2.5mm;3.5mm +
glandular-pubescent +
ovate;lanceolate +
1.2mm;1.8mm +
short-tubular +  and short-campanulate +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.48 cm4.8 mm <br />0.0048 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Catalina beardtongue +
whitish +, yellow +, lavender +  and violet or purple +
tubular-funnelform +
ampliate +  and ventricose-ampliate +
0.9 cm9 mm <br />0.009 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
1-3-flowered +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
scale-like +  and not needlelike +
drupe-like +
1900–2100 m. +
curved +  and straight +
1 +  and 4 +
Pinyon-juniper and oak woodlands, granite crevices. +
golden yellow +  and white +
puberulent +
pointed +  and scale-like +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
membranous +
terminal +  and axillary +
persistent +  and deciduous +
cauline +, proximal +  and basal +
hairy +  and glabrous +
leathery +
orbiculate;linear;orbiculate;linear;truncate;oblanceolate;obovate;oblong;elliptic;round;lanceolate;ovate +
erose +  and entire +
glabrate +, hairy +  and glandular-pubescent +
toothed +  and entire +
herbaceous +  and scarious +
axile +  and parietal +
basal +, apical +  and superior +
tenuinucellate +, unitegmic +  and hemitropous +
campylotropous +, hemianatropous +  and anatropous +
ascending +  and erect +
glandular-pubescent +
ascending;erect +
glandular-pubescent +
5 +  and 4 +
Flowering Jun–Aug. +
navicular-sigmoid +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
oblanceolate +  and linear +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Bull. Torrey Bot. Club +
minute +
dark-brown +  and black +
angled +  and rounded +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
Endemic +  and Conservation concern +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
included +  and exserted +
0.7 cm7 mm <br />0.007 m <br /> (?) +  and 0.8 cm8 mm <br />0.008 m <br /> (?) +
subalternate +, alternate +, whorled +  and opposite +
climbing +  and scrambling +
sprawling +, creeping +  and prostrate +
ascending;erect +
hairy +  and glabrous +
10 cm100 mm <br />0.1 m <br /> (35 cm350 mm <br />0.35 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
papillate +
denticulate +
Penstemon discolor +
Penstemon sect. Caespitosi +
species +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
2-ridged +  and inflated +
not constricted +
secund +, interrupted +  and continuous +
cylindric +
2 cm20 mm <br />0.02 m <br /> (15 cm150 mm <br />0.15 m <br />) +
straight +
gibbous +  and not spurred +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
subshrub +  and cespitose +