Artemisia ludoviciana subsp. incompta

(Nuttall) D. D. Keck

Publ. Carnegie Inst. Wash. 520: 327. 1940.

Common names: Mountain wormwood
Basionym: Artemisia incompta Nuttall Trans. Amer. Philos. Soc., n. s. 7: 400. 1841
Synonyms: Artemisia arachnoidea E. Sheldon Artemisia atomifera Piper Artemisia lindleyana Besser Artemisia ludoviciana var. incompta (Nuttall) Cronquist Artemisia prescottiana Linnaeus Artemisia vulgaris var. incompta (Nuttall) H. St. John
Treatment appears in FNA Volume 19. Treatment on page 529. Mentioned on page 527.

Stems 20–50 (–80) cm, mostly simple, hairy. Leaves bicolor (white and green, or gray-green and green); blades narrowly to broadly lanceolate, 1.5–11 × 1–1.5 cm, irregularly lobed (lobes usually 1/3+ blade widths), faces hairy (abaxial) or glabrous or glabrescent. Heads in paniculiform arrays (10–) 15–25 (–35) × (2–) 3–8 (–10) cm. Involucres (broadly campanulate) 3 (–4) × 3 (–5) mm. Florets: pistillate 5–12; bisexual 6–45; corollas yellow, sometimes red-tinged, 1.5–2 mm. 2n = 36, 54.


Phenology: Flowering mid summer–late fall.
Habitat: Open meadows, mountain slopes
Elevation: 1900–3500 m

Distribution

V19-912-distribution-map.gif

Alta., B.C., Calif., Colo., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo., Mexico

Discussion

Subspecies incompta varies. It could be (and has been) subdivided. The variation found within one population, as well as from one part of its range to another, makes the recognition of discrete taxa difficult as well as questionable. The morphologic variant treated as Artemisia lindleyana by some authors may warrant infraspecific status.

Selected References

None.

Lower Taxa

None.
not tailed +  and obtuse +
scarious +
congested +  and open +
indeterminate +  and determinate +
Leila M. Shultz +
(Nuttall) D. D. Keck +
decurrent +
Artemisia incompta +
compound +  and simple +
elliptic +  and linear to broadly +
1.5 cm15 mm <br />0.015 m <br /> (11 cm110 mm <br />0.11 m <br />) +
lobed;lanceolate +
1cm;1.5cm +
fertile +  and bisexual +
Mountain wormwood +
zygomorphic +, actinomorphic +  and (3-)5-merous +
red-tinged +  and yellow +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
winged +  and monomorphic +
ellipsoid +
fertile +  and bisexual +
fertile +  and bisexual +
Alta. +, B.C. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +, Wash. +, Wyo. +  and Mexico +
1900–3500 m +
gland-dotted +
glabrescent +, glabrous +  and hairy +
peripheral +
winged +  and beaked +
dispersed +
Open meadows, mountain slopes +
spiciform +  and racemiform +
in subcapitate clusters +  and singly +
25 cm250 mm <br />0.25 m <br /> (35 cm350 mm <br />0.35 m <br />) +
8 cm80 mm <br />0.08 m <br /> (10 cm100 mm <br />0.1 m <br />) +
indeterminate +
15 cm150 mm <br />0.15 m <br /> (25 cm250 mm <br />0.25 m <br />) +
heterogamous +  and homogamous +
3 cm30 mm <br />0.03 m <br /> (8 cm80 mm <br />0.08 m <br />) +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.3 cm3 mm <br />0.003 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 />) +
3 cm30 mm <br />0.03 m <br /> (?) +
turbinate;campanulate +
3 cm30 mm <br />0.03 m <br /> (?) +
sessile +  and petiolate +
persistent +  and deciduous +
deltate +
entire +  and dentate +
2-carpellate +
persistent +
Flowering mid summer–late fall. +
2 +  and 20 +
Publ. Carnegie Inst. Wash. +
styliferous +, neuter +  and pistillate +
sterile +  and fertile +
conic;convex;conic;convex;flat +
2 +  and 5 +
exalbuminous +
Illustrated +
gray-green +
relatively few +  and relatively numerous +
wand-like +
20 cm200 mm <br />0.2 m <br /> (50 cm500 mm <br />0.5 m <br />) +
appendaged +  and truncate +
papillate +
Artemisia arachnoidea +, Artemisia atomifera +, Artemisia lindleyana +, Artemisia ludoviciana var. incompta +, Artemisia prescottiana +  and Artemisia vulgaris var. incompta +
Artemisia ludoviciana subsp. incompta +
Artemisia ludoviciana +
subspecies +
funnel +  and subglobose +
cylindric +
fibrous-rooted +  and taprooted +
20 cm200 mm <br />0.2 m <br /> (80 cm800 mm <br />0.8 m <br />) +
shrub +  and subshrub +