Glossopetalon spinescens var. aridum

M. E. Jones

Contr. W. Bot. 8: 28. 1898.

EndemicIllustrated
Synonyms: Forsellesia arida (M. E. Jones) A. Heller F. nevadensis (A. Gray) Greene F. stipulifera (H. St. John) Ensign Glossopetalon nevadense A. Gray G. nevadense var. stipuliferum (H. St. John) C. L. Hitchcock G. stipuliferum
Treatment appears in FNA Volume 9. Treatment on page 15. Mentioned on page 16.

Shrubs, (25–) 50–200 (–300) cm. Branchlets often ± ascending, turning from grayish green to dull yellowish-brown toward end of 2d or 3d years, glabrous. Leaves often still developing at flowering and early deciduous, branches often appearing nearly leafless during much of growing season; stipules present, sometimes difficult to observe, adnate portion dark reddish purple to nearly black, usually well developed, noticeably thickened, free portion relatively well developed, mostly narrowly triangular to subulate, 0.5–1.7 mm; largest blade 7–12 (–17) × (1.5–) 2–6 mm, margins ciliolate, glabrous or sparsely to moderately puberulent. Petals 4–9 mm, mostly widest proximal to apex sometimes nearly oblong, apex rounded to acute or acuminate, tips blunt or sharp. Stamens 6–10, in 2 unequal series.


Phenology: Flowering Mar–Jun.
Habitat: Rocky slopes, crevices and ledges of limestone, igneous cliffs and outcrops
Elevation: 1100–2500 m

Distribution

V9 21-distribution-map.jpg

Ariz., Calif., Idaho, Mont., Nev., Oreg., Utah, Wash.

Discussion

N. H. Holmgren (1988, 1997) noted apparent intergrades of var. aridum with var. meionandrum in southeastern Utah and with var. microphyllum in northern Arizona, southern Nevada, and southwestern Utah.

Selected References

None.

Lower Taxa

None.

"widest" is not a number.

puberulent +, , +  and glabrous +
fimbrillate +  and discoid +
Charles T. Mason Jr.† +  and George Yatskievych +
M. E. Jones +
persistent +
tapered +, angled +  and decurrent +
expanded +
glandular-thickened +
0.3 cm3 mm <br />0.003 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
oblanceolate +
1.2mm;6mm +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
slender +  and relatively stout +
opposite +  and alternate +
Ariz. +, Calif. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +  and Wash. +
1100–2500 m +
grayish green;dull yellowish-brown +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
short-tapered +  and angled +
Rocky slopes, crevices and ledges of limestone, igneous cliffs and outcrops +
1.2 cm12 mm <br />0.012 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
deciduous +
glabrous or +  and sparsely moderately puberulent +
2-3-lobed +  and entire +
obscure +  and apparent +
puberulent +, glabrous +  and glaucous +
puberulent +  and glabrous +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
persistent +
distinct +
0.4 cm4 mm <br />0.004 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
Flowering Mar–Jun. +
sessile +  and short-stipitate +
free +  and distinct +
purple +  and nearly black +
free +  and adnate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
Contr. W. Bot. +
decurrent +
pitted +  and smooth +
reniform +  and spheric +
distinct +
narrowly ovate;ovate +
unequal +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
unequal +
Endemic +  and Illustrated +
decurrent +
triangular to subulate +
? (?) +  and ? (?) +
hardened +  and scarious +
Forsellesia arida +, F. nevadensis +, F. stipulifera +, Glossopetalon nevadense +, G. nevadense var. stipuliferum +  and G. stipuliferum +
Glossopetalon spinescens var. aridum +
Glossopetalon spinescens +
variety +
not spinescent +  and spinescent +
sharp +  and blunt +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
yellowish-brown +  and orangish brown +
puberulent +  and glabrous +