Artemisia ludoviciana subsp. mexicana

(Willdenow ex Sprengel) D. D. Keck

Proc. Calif. Acad. Sci., ser. 4, 25: 452. 1946.

Common names: Mexican wormwood
Basionym: Artemisia mexicana Willdenow ex Sprengel Syst. Veg. 3: 490. 1826
Synonyms: Artemisia neomexicana Greene ex Rydberg Artemisia revoluta Rydberg
Treatment appears in FNA Volume 19. Treatment on page 529. Mentioned on page 527.

Stems 30–80 (–100) cm, widely branched, sparsely hairy or glabrous. Leaves strongly bicolor (white and green, or gray-green and green), narrowly lanceolate, 4–10 × 0.5–1 cm, lobed; faces ± tomentose (abaxial) or glabrescent. Heads in paniculiform or racemiform arrays 1–8 × 2–5 cm. Involucres (campanulate) 3–4 × 2–3 mm. Florets: pistillate (5–) 8–10; bisexual (6–) 10–20; corollas ca. 1.5 mm. 2n = 18, 36.


Phenology: Flowering late summer–late fall.
Habitat: Mountain slopes, rocky soils
Elevation: 500–1000 m

Distribution

V19-913-distribution-map.gif

Ariz., Colo., Nev., N.Mex., Okla., Tex., Mexico

Discussion

Selected References

None.

Lower Taxa

None.
not tailed +  and obtuse +
scarious +
congested +  and open +
indeterminate +  and determinate +
Leila M. Shultz +
(Willdenow ex Sprengel) D. D. Keck +
decurrent +
Artemisia mexicana +
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;relatively deeply pinnatifid +
0.5cm;4cm +
fertile +  and bisexual +
Mexican wormwood +
zygomorphic +, actinomorphic +  and (3-)5-merous +
red-tinged +  and yellow +
1.5 cm15 mm <br />0.015 m <br /> (?) +
winged +  and monomorphic +
ellipsoid +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +, Colo. +, Nev. +, N.Mex. +, Okla. +, Tex. +  and Mexico +
500–1000 m +
gland-dotted +
glabrescent +  and tomentose +
peripheral +
winged +  and beaked +
dispersed +
Mountain slopes, rocky soils +
racemiform +  and paniculiform +
in subcapitate clusters +  and singly +
indeterminate +
1 cm10 mm <br />0.01 m <br /> (8 cm80 mm <br />0.08 m <br />) +
heterogamous +  and homogamous +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
turbinate;campanulate +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
sessile +  and petiolate +
persistent +  and deciduous +
4cm;10cm +
lobed;lanceolate +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
deltate +
entire +  and dentate +
2-carpellate +
persistent +
Flowering late summer–late fall. +
2 +  and 20 +
Proc. Calif. Acad. Sci., ser. +
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 +
30 cm300 mm <br />0.3 m <br /> (80 cm800 mm <br />0.8 m <br />) +
appendaged +  and truncate +
papillate +
Artemisia neomexicana +  and Artemisia revoluta +
Artemisia ludoviciana subsp. mexicana +
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 +