Artemisia alaskana

Rydberg in N. L. Britton et al.

in N. L. Britton et al., N. Amer. Fl. 34: 281. 1916.

Common names: Siberian wormwood
Endemic
Synonyms: Artemisia tyrrellii Rydberg
Treatment appears in FNA Volume 19. Treatment on page 523. Mentioned on page 521.

Perennials or subshrubs, 15–30 (–60) cm (not cespitose), aromatic (caudices woody). Stems 1–10, erect, gray-green, simple (suffrutescent from woody offsets), densely hairy to glabrescent. Leaves basal and cauline, mostly gray-green; blades obovate, 1.5–5 × 0.5–1.5 cm, 3-lobed to 2-ternately lobed (lobes 0.5–3 mm wide, margins flat; cauline leaves smaller, sometimes entire), faces tomentose. Heads (peduncles 0 or to 30 mm) in (leafy) paniculiform to racemiform arrays 12–25 × 1–4.5 cm. Involucres broadly campanulate, 3.5–5 × 6–9 mm. Phyllaries ovate (margins brownish or hyaline), tomentose. Florets: pistillate 8–10; bisexual 20–45; corollas yellow, 2–2.5 mm, glabrous or glandular. Cypselae ellipsoid (flattened), 1–1.5 mm, glabrous. 2n = 18.


Phenology: Flowering early–late summer.
Habitat: Well-drained soils, flood plains, gravel stream banks, roadsides, dry, rocky slopes, forest openings, alpine and arctic tundras
Elevation: 100–2500 m

Distribution

V19-892-distribution-map.gif

B.C., N.W.T., Yukon, Alaska.

Discussion

As circumscribed here, Artemisia alaskana is known from northwestern North America. The type specimen of A. alaskana is atypical, with longer peduncles and narrower leaf lobes than are found in most populations.

Selected References

None.

Lower Taxa

None.
... more about "Artemisia alaskana"
not tailed +  and obtuse +
scarious +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Leila M. Shultz +
Rydberg in N. L. Britton et al. +
decurrent +
compound +  and simple +
1.5 cm15 mm <br />0.015 m <br /> (5 cm50 mm <br />0.05 m <br />) +
3-lobed;2-ternately lobed +
0.5cm;1.5cm +
fertile +  and bisexual +
Siberian wormwood +
zygomorphic +, actinomorphic +  and (3-)5-merous +
glandular +  and glabrous +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
winged +  and monomorphic +
ellipsoid +
fertile +  and bisexual +
fertile +  and bisexual +
B.C. +, N.W.T. +, Yukon +  and Alaska. +
100–2500 m +
gland-dotted +
peripheral +
winged +  and beaked +
dispersed +
Well-drained soils, flood plains, gravel stream banks, roadsides, dry, rocky slopes, forest openings, alpine and arctic tundras +
paniculiform +  and racemiform +
in subcapitate clusters +  and singly +
indeterminate +
12 cm120 mm <br />0.12 m <br /> (25 cm250 mm <br />0.25 m <br />) +
heterogamous +  and homogamous +
1 cm10 mm <br />0.01 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
each +  and sessile +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
campanulate +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
sessile +  and petiolate +
gray-green +
persistent +  and deciduous +
cauline +  and basal +
deltate +
entire +  and dentate +
2-carpellate +
persistent +
Flowering early–late summer. +
2 +  and 20 +
in N. L. Britton et al., N. Amer. Fl. +
styliferous +, neuter +  and pistillate +
sterile +  and fertile +
conic;convex;conic;convex;flat +
2 +  and 5 +
exalbuminous +
gray-green +
1 +  and 10 +
wand-like +
appendaged +  and truncate +
papillate +
Artemisia tyrrellii +
Artemisia alaskana +
Artemisia subg. Artemisia +
species +
funnel +  and subglobose +
cylindric +
fibrous-rooted +  and taprooted +
30 cm300 mm <br />0.3 m <br /> (60 cm600 mm <br />0.6 m <br />) +
15 cm150 mm <br />0.15 m <br /> (30 cm300 mm <br />0.3 m <br />) +