Artemisia douglasiana

Besser in W. J. Hooker

in W. J. Hooker, Fl. Bor.-Amer. 1: 323. 1833.

Common names: Northwest mugwort Douglas sagewort
Endemic
Synonyms: Artemisia campestris var. douglasiana (Besser) B. Boivin Artemisia caudata var. douglasiana (Besser) B. Boivin Artemisia commutata var. douglasiana (Besser) Besser Artemisia desertorum var. douglasiana Besser Artemisia heterophylla Nuttall Artemisia ludoviciana var. douglasiana (Besser) D. C. Eaton Artemisia vulgaris var. douglasiana (Besser) H. St. John
Treatment appears in FNA Volume 19. Treatment on page 524. Mentioned on page 522, 533.

Perennials, 50–180 (–250) cm, aromatic (rhizomatous). Stems 1–20, erect, brown to gray-green, simple, hairy or glabrescent. Leaves cauline, bicolor (white and green to light gray-green); blades narrowly elliptic to widely oblanceolate, (1–) 3–11 (–15) × 0.5–2 (–6) cm (proximal with 3–5 lateral lobes, distal mostly entire), faces sparsely tomentose (abaxial) to sparsely hairy (adaxial). Heads (usually nodding) in (leafy) paniculiform arrays 10–30 × 3–9 cm (branches widely spreading, ascending, stout). Involucres narrowly turbinate to campanulate, 2–3 × 2–4 mm. Phyllaries (green to gray) ovate, tomentose to pubescent. Florets: pistillate 6–10; bisexual 6–25; corollas pale-yellow, 1–1.5 mm, glabrous, sometimes glandular. Cypselae ellipsoid, 0.5–1 mm, glabrous. 2n = 54.


Phenology: Flowering mid spring–late fall.
Habitat: Meadows, shaded sites, along drainages
Elevation: 100–2200 m

Distribution

V19-897-distribution-map.gif

Calif., Nev., Oreg., Wash.

Discussion

Artemisia douglasiana is sometimes weedy. Reports from areas outside the northwestern portion of the United States are based on misidentifications of plants in the A. ludoviciana complex.

Selected References

None.

Lower Taxa

None.
... more about "Artemisia douglasiana"
not tailed +  and obtuse +
scarious +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Leila M. Shultz +
Besser in W. J. Hooker +
decurrent +
compound +  and simple +
11 cm110 mm <br />0.11 m <br /> (15 cm150 mm <br />0.15 m <br />) +
2 cm20 mm <br />0.02 m <br /> (6 cm60 mm <br />0.06 m <br />) +
3 cm30 mm <br />0.03 m <br /> (11 cm110 mm <br />0.11 m <br />) +
narrowly elliptic;widely oblanceolate +
0.5cm;2cm +
fertile +  and bisexual +
Northwest mugwort +  and Douglas sagewort +
zygomorphic +, actinomorphic +  and (3-)5-merous +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
winged +  and monomorphic +
ellipsoid +
fertile +  and bisexual +
fertile +  and bisexual +
Calif. +, Nev. +, Oreg. +  and Wash. +
100–2200 m +
gland-dotted +
sparsely tomentose +  and sparsely hairy +
peripheral +
winged +  and beaked +
dispersed +
Meadows, shaded sites, along drainages +
spiciform +  and racemiform +
in subcapitate clusters +  and singly +
indeterminate +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
heterogamous +  and homogamous +
3 cm30 mm <br />0.03 m <br /> (9 cm90 mm <br />0.09 m <br />) +
each +  and sessile +
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 /> (0.3 cm3 mm <br />0.003 m <br />) +
narrowly turbinate;campanulate +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
sessile +  and petiolate +
persistent +  and deciduous +
deltate +
entire +  and dentate +
2-carpellate +
persistent +
Flowering mid spring–late fall. +
tomentose +  and pubescent +
2 +  and 20 +
in W. J. Hooker, Fl. Bor.-Amer. +
styliferous +, neuter +  and pistillate +
sterile +  and fertile +
conic;convex;conic;convex;flat +
2 +  and 5 +
exalbuminous +
brown +  and gray-green +
1 +  and 20 +
wand-like +
appendaged +  and truncate +
papillate +
Artemisia campestris var. douglasiana +, Artemisia caudata var. douglasiana +, Artemisia commutata var. douglasiana +, Artemisia desertorum var. douglasiana +, Artemisia heterophylla +, Artemisia ludoviciana var. douglasiana +  and Artemisia vulgaris var. douglasiana +
Artemisia douglasiana +
Artemisia subg. Artemisia +
species +
funnel +  and subglobose +
cylindric +
fibrous-rooted +  and taprooted +
180 cm1,800 mm <br />1.8 m <br /> (250 cm2,500 mm <br />2.5 m <br />) +
50 cm500 mm <br />0.5 m <br /> (180 cm1,800 mm <br />1.8 m <br />) +
shrub +  and subshrub +