Penstemon linarioides var. sileri

A. Gray in A. Gray et al.

Syn. Fl. N. Amer. 2(1): 270. 1878.

Endemic
Synonyms: Penstemon linarioides subsp. sileri (A. Gray) D. D. Keck P. linarioides var. viridis D. D. Keck
Treatment appears in FNA Volume 17. Treatment on page 105. Mentioned on page 104.

Stems 8–40 cm. Leaves glabrous, glabrate, retrorsely hairy, or puberulent, hairs pointed, cauline 8–26 × 0.5–2 mm, blade linear. Flowers: staminode: distal 3–5 mm densely pilose, hairs yellow, to 1.2 mm, rest of distal 2–3 mm sparsely to moderately pilose.


Phenology: Flowering May–Sep(–Oct).
Habitat: Sandy to clay soils, sagebrush shrublands, oak or oak-juniper woodlands, pine forests.
Elevation: 1200–2400 m.

Discussion

Variety sileri is known from northern Arizona, southern Nevada, and southwestern Utah. Plants with glabrous or nearly glabrous leaves from northern Arizona and southern Utah have been referred to var. viridis. As noted by N. H. Holmgren (1984), such forms occur sporadically through much of the range of var. sileri, suggesting that taxonomic recognition of var. viridis is unwarranted. Some specimens included in var. sileri from northern Arizona, especially from the Kaibab Plateau, have the habit of subsp. compactifolius (included here in var. linarioides) but the leaf pubescence of var. sileri (or var. viridis). Holmgren identified three morpho-geographic races that may warrant recognition.

Selected References

None.

Lower Taxa

None.

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

glandular-pubescent +
acute +  and acuminate +
Craig C. Freeman +
A. Gray in A. Gray et al. +
glandular-pubescent +
alternate +, opposite +, whorled +, helical +  and subopposite +
tapered;truncate +
Penstemon +
oblanceolate;lanceolate or 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 +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
lanceolate;ovate +
short-tubular +  and short-campanulate +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
sessile +  and petiolate +
0.8 cm8 mm <br />0.008 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
yellowish +, white +, lavender +  and blue +
salverform +  and tubular-funnelform +
ventricose-ampliate +
1.6 cm16 mm <br />0.016 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
scale-like +  and not needlelike +
Ariz. +, Nev. +  and Utah. +
drupe-like +
1200–2400 m. +
curved +  and straight +
1 +  and 4 +
Sandy to clay soils, sagebrush shrublands, oak or oak-juniper woodlands, pine forests. +
pointed +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
membranous +
terminal +  and axillary +
persistent +  and deciduous +
cauline +, proximal +  and basal +
puberulent +, hairy +, glabrate +  and glabrous +
not 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 +
ascending;erect +
5 +  and 4 +
Flowering May–Sep(–Oct). +
navicular-sigmoid +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
lanceolate +  and linear +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Syn. Fl. N. Amer. +
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 />) +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
0.6 cm6 mm <br />0.006 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 +
8 cm80 mm <br />0.08 m <br /> (40 cm400 mm <br />0.4 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
papillate +
denticulate +
Penstemon linarioides subsp. sileri +  and P. linarioides var. viridis +
Penstemon linarioides var. sileri +
Penstemon linarioides +
variety +
0.55 cm5.5 mm <br />0.0055 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
2-ridged +  and inflated +
not constricted +
secund +, interrupted +  and continuous +
cylindric +
3 cm30 mm <br />0.03 m <br /> (17 cm170 mm <br />0.17 m <br />) +
straight +
0.1 cm1 mm <br />0.001 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
gibbous +  and not spurred +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
subshrub +  and cespitose +