Artemisia cana subsp. cana

Common names: Silver wormwood
IllustratedEndemic
Synonyms: Artemisia columbiensis Nuttall
Treatment appears in FNA Volume 19. Treatment on page 513. Mentioned on page 512.

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

V19-868-distribution-map.gif

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.

Selected References

None.

Lower Taxa

None.
not tailed +  and obtuse +
scarious +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Leila M. Shultz +
decurrent +
Tridentatae +
compound +  and simple +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
silvery-canescent +
lobed;narrowly elliptic;lanceolate +
0.3cm;1cm +
Silver wormwood +
zygomorphic +, actinomorphic +  and (3-)5-merous +
red +  and pale-yellow +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
winged +  and monomorphic +
fertile +  and bisexual +
fertile +  and bisexual +
Alta. +, B.C. +, Man. +, Sask. +, Colo. +, Mont. +, Nebr. +, N.Dak. +, S.Dak. +  and Wyo. +
1000–1500 m +
gland-dotted +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
fertile +  and bisexual +
winged +  and beaked +
dispersed +
Sandy loam soils, often along streams +
spiciform +  and racemiform +
in subcapitate clusters +  and singly +
indeterminate +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +
heterogamous +  and homogamous +
5 cm50 mm <br />0.05 m <br /> (7 cm70 mm <br />0.07 m <br />) +
each +  and sessile +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
campanulate +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
sessile +  and petiolate +
whitish gray +
deciduous +
cauline +  and basal +
deltate +
entire +  and dentate +
2-carpellate +
persistent +
Flowering mid–late summer. +
2 +  and 20 +
Fl. Amer. Sept. +
styliferous +, neuter +  and pistillate +
sterile +  and fertile +
conic;convex;conic;convex;flat +
2 +  and 5 +
exalbuminous +
Illustrated +  and Endemic +
white +  and light gray or brown +
1 +  and 10 +
not wand-like +
appendaged +  and truncate +
papillate +
Artemisia columbiensis +
Artemisia cana subsp. cana +
Artemisia cana +
subspecies +
funnel +  and subglobose +
cylindric +
perennial +, biennial +  and annual +