Artemisia cana subsp. cana

unknown
Common names: Silver wormwood
Synonyms: Artemisia columbiensis Nuttall
Treatment appears in FNA Volume 19. Treatment on page 513. Mentioned on page 512.
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Illustrator: Linda Ann Vorobik
Shrubs, 100–150 cm. Stems white to light gray or brown. Leaves whitish gray, blades narrowly elliptic to lanceolate, 2–8 × 0.3–1 cm, usually entire, sometimes irregularly lobed, densely silvery-canescent. Heads in (leafy) arrays 10–20 × 5–7 cm. Involucres broadly campanulate, 3–4 × 3–5 mm. Phyllaries broadly ovate (mostly obtuse), densely hairy. Florets 10–20. Cypselae 1–1.2 mm. 2n = 54.

Phenology: Flowering mid–late summer.
Habitat: Sandy loam soils, often along streams
Elevation: 1000–1500 m

Distribution

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Alta., B.C., Man., Sask., Colo., Mont., Nebr., N.Dak., S.Dak., Wyo.

Discussion

Subspecies cana is found primarily in the grasslands of Canada and the west-central United States. It is unusual within the species in that there is no morphologic evidence of hybridization with other species in subg. Tridentatae.

References

None.

Lower Taxa

No lower taxa listed.