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"
Leila M. Shultz +
Rydberg in N. L. Britton et al. +
Siberian wormwood +
B.C. +, N.W.T. +, Yukon +  and Alaska. +
100–2500 m +
Well-drained soils, flood plains, gravel stream banks, roadsides, dry, rocky slopes, forest openings, alpine and arctic tundras +
Flowering early–late summer. +
in N. L. Britton et al., N. Amer. Fl. +
Artemisia tyrrellii +
Artemisia alaskana +
Artemisia subg. Artemisia +
species +