Artemisia arbuscula subsp. thermopola

Beetle

Rhodora 61: 83. 1959.

Common names: Hot Springs sagebrush
Endemic
Synonyms: Seriphidium arbusculum var. thermopolum (Beetle) Y. R. Ling
Treatment appears in FNA Volume 19. Treatment on page 512. Mentioned on page 511, 518.

Leaves narrowly cuneate (5–10 × 3–6 mm, lobed, lobes 1/2+ blade lengths, laterals to 1 mm wide, often acute). Involucres (1.5–) 2–2.5 × 1.5–2 mm.


Phenology: Flowering mid–late summer.
Habitat: Rocky soils of igneous origin
Elevation: 2200–2500 m

Discussion

Because of its deeply lobed leaves, subsp. thermopola can be confused with Artemisia tripartita. The habit, leaf morphology, and geographic distribution of subsp. thermopola suggest introgression between typical A. arbuscula and A. tripartita.

Selected References

None.

Lower Taxa

None.
not tailed +  and obtuse +
scarious +
paniculiform +  and spiciform +
indeterminate +  and determinate +
2 cm20 mm <br />0.02 m <br /> (9 cm90 mm <br />0.09 m <br />) +
0.5cm +  and 2cm +
Leila M. Shultz +
Beetle +
decurrent +
Tridentatae +
compound +  and simple +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
lobed;cuneate +
2mm;5mm +
Hot Springs sagebrush +
zygomorphic +, actinomorphic +  and (3-)5-merous +
red +  and pale-yellow +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
winged +  and monomorphic +
fertile +  and bisexual +
fertile +  and bisexual +
Idaho +, Utah +  and Wyo. +
2200–2500 m +
gland-dotted +
pistillate +, staminate +  and neuter +
fertile +  and bisexual +
winged +  and beaked +
dispersed +
Rocky soils of igneous origin +
spiciform +  and racemiform +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
globose-ovoid;campanulate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
sessile +  and petiolate +
gray-green +
persistent +
cauline +  and basal +
cuneate +
deltate +
entire +  and dentate +
2-carpellate +
persistent +
Flowering mid–late summer. +
tomentose +  and pubescent +
2 +  and 20 +
styliferous +, neuter +  and pistillate +
sterile +  and fertile +
conic;convex;conic;convex;flat +
2 +  and 5 +
exalbuminous +
gray-green +  and brown +
1 +  and 10 +
not wand-like +
appendaged +  and truncate +
papillate +
Seriphidium arbusculum var. thermopolum +
Artemisia arbuscula subsp. thermopola +
Artemisia arbuscula +
subspecies +
funnel +  and subglobose +
cylindric +
perennial +, biennial +  and annual +
shrub +  and root-sprouting +