Artemisia borealis subsp. richardsoniana

(Besser) Korobkov in A. I. Tolmatchew

in A. I. Tolmatchew, Fl. Arct. URSS 10: 178. 1987.

Common names: Richardson’s sagewort
Endemic
Basionym: Artemisia richardsoniana Besser Bull. Soc. Imp. Naturalistes Moscou 9: 64. 1836,
Synonyms: Artemisia caudata var. richardsoniana (Besser) B. Boivin Artemisia desertorum var. richardsoniana (Besser) Besser
Treatment appears in FNA Volume 19. Treatment on page 506.

Plants (6–) 8–15 (–20) cm, herbage white-hoary. Corollas (at least lobes) deep red, 3–3.5 mm.


Phenology: Flowering mid–late summer.
Habitat: River terraces, tundra
Elevation: 0–600 m

Distribution

V19-851-distribution-map.gif

N.W.T., Nunavut, Yukon, Alaska.

Discussion

Long overlooked, subsp. richardsoniana is easily distinguished by its relatively short stature, dense, white indument, and deep red corollas. It is known only from western arctic North America.

Selected References

None.

Lower Taxa

None.
not tailed +  and obtuse +
scarious +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Leila M. Shultz +
(Besser) Korobkov in A. I. Tolmatchew +
decurrent +
Artemisia richardsoniana +
compound +  and simple +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
lobed;ovate +
0.5cm;1cm +
Richardson’s sagewort +
zygomorphic +, actinomorphic +  and (3-)5-merous +
2.2 +  and 3.5 +
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
compressed +  and oblong-lanceoloid +
fertile +  and bisexual +
fertile +  and bisexual +
N.W.T. +, Nunavut +, Yukon +  and Alaska. +
0–600 m +
gland-dotted +
staminate +  and pistillate +
winged +  and beaked +
dispersed +
River terraces, tundra +
spiciform +  and racemiform +
in subcapitate clusters +  and singly +
9 cm90 mm <br />0.09 m <br /> (12 cm120 mm <br />0.12 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
indeterminate +
4 cm40 mm <br />0.04 m <br /> (9 cm90 mm <br />0.09 m <br />) +
heterogamous +  and homogamous +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 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 />) +
hemispheric +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
sessile +  and petiolate +
persistent +
basal +  and cauline +
linear +  and narrowly oblong +
entire +  and dentate +
2-carpellate +
persistent +
Flowering mid–late summer. +
tomentose-villous +
2 +  and 20 +
in A. I. Tolmatchew, Fl. Arct. URSS +
styliferous +, neuter +  and pistillate +
sterile +  and fertile +
conic;convex;conic;convex;flat +
2 +  and 5 +
exalbuminous +
1 (?) +  and 2 (?) +
gray-green +
2 +  and 5 +
wand-like +
appendaged +  and truncate +
papillate +
Artemisia caudata var. richardsoniana +  and Artemisia desertorum var. richardsoniana +
Artemisia borealis subsp. richardsoniana +
Artemisia borealis +
subspecies +
funnel +  and subglobose +
cylindric +
20 cm200 mm <br />0.2 m <br /> (40 cm400 mm <br />0.4 m <br />) +
8 cm80 mm <br />0.08 m <br /> (20 cm200 mm <br />0.2 m <br />) +
taprooted +  and fibrous-rooted +