Artemisia arbuscula subsp. arbuscula

Endemic
Treatment appears in FNA Volume 19. Treatment on page 511.

Leaves broadly cuneate (lobed, lobes less than 1/2 blade lengths, 1–3 mm wide, rounded). Involucres 3.5–4 (–5) × 2–4.5 mm. 2n = 18, 36.


Phenology: Flowering mid–late summer.
Habitat: Rocky sedimentary soils, high valleys, mountain slopes
Elevation: 1500–3800 m

Distribution

V19-863-distribution-map.gif

Calif., Colo., Idaho, Mont., Nev., Utah, Wash., Wyo.

Discussion

The relatively large heads of Artemisia arbuscula subsp. arbuscula suggest a relationship with A. cana; the extreme morphologic variability of this subspecies from east to west may be the result of hybridization with various subspecies within the A. cana complex.

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 +
Nuttall +
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 +
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 +
Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, Utah +, Wash. +  and Wyo. +
1500–3800 m +
gland-dotted +
pistillate +, staminate +  and neuter +
fertile +  and bisexual +
winged +  and beaked +
dispersed +
Rocky sedimentary soils, high valleys, mountain slopes +
spiciform +  and racemiform +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
globose-ovoid;campanulate +
0.2 cm2 mm <br />0.002 m <br /> (0.45 cm4.5 mm <br />0.0045 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 +
Trans. Amer. Philos. Soc., n. s. +
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 +
Artemisia tridentata subsp. arbuscula +, Artemisia tridentata var. arbuscula +  and Seriphidium arbusculum +
Artemisia arbuscula subsp. arbuscula +
Artemisia arbuscula +
subspecies +
funnel +  and subglobose +
cylindric +
perennial +, biennial +  and annual +
shrub +  and root-sprouting +