Artemisia tilesii

Ledebour

Mém. Acad. Imp. Sci. St. Pétersbourg Hist. Acad. 5: 568. 1814.

Synonyms: Artemisia hookeriana Besser Artemisia hultenii M. M. Maximova Artemisia tilesii var. aleutica (Hultén) S. L. Welsh Artemisia tilesii var. elatior Torrey & A. Gray Artemisia tilesii subsp. gormanii (Rydberg) Hultén Artemisia tilesii subsp. hultenii (M. M. Maximova) V. G. Sergienko Artemisia tilesii var. unalaschcensis Besser Artemisia unalaskensis var. aleutica Hultén Artemisia vulgaris subsp. tilesii (Ledebour) H. M. Hall & Clements
Treatment appears in FNA Volume 19. Treatment on page 533. Mentioned on page 522.

Perennials, 20–60 (–80) cm, mildly aromatic (rhizomes coarse). Stems 1–3, erect, white, tomentose (on distal branches, hairs appressed) or glabrate. Leaves basal and cauline, bicolor (white and green); blades (basal) linear to broadly lanceolate, 3–7 (–10) × 2–5 (–6) cm, coarsely pinnately lobed (cauline becoming linear distally), faces tomentose (abaxial) or glabrous (adaxial). Heads in compact to broadly branched, paniculiform arrays 1–20 × 2–6 cm. Involucres broadly campanulate, 4–5 × 3.5–4 mm. Phyllaries (violet-brown) oval (outer) to elliptic or lanceolate, sparsely tomentose. Florets: pistillate 9; bisexual 25–60; corollas yellow, 1.5–3 mm, glabrous (style-branches included, erect, linear, relatively short, short-ciliate). Cypselae oblong-linear (angular), 1.2–1.5 mm, glabrous. 2n = 18, 36.


Phenology: Flowering mid summer–early fall.
Habitat: Arctic and alpine tundra, sandy, rocky slopes near shorelines
Elevation: 0–2000 m

Distribution

V19-927-distribution-map.gif

Alta., B.C., Man., N.W.T., Nunavut, Ont., Que., Sask., Yukon, Alaska, Idaho, Mont., Oreg., Wash., Asia (Russia)

Discussion

Artemisia tilesii has a bewildering array of variation in leaf and inflorescence morphology that has been separated into four infraspecific taxa recognized in some floras. I am unable to separate these taxa consistently and am including them within a broad circumscription of the species.

Selected References

None.

Lower Taxa

None.
... more about "Artemisia tilesii"
not tailed +  and obtuse +
scarious +
paniculiform +, compact +  and broadly branched +
indeterminate +  and determinate +
1 cm10 mm <br />0.01 m <br /> (20 cm200 mm <br />0.2 m <br />) +
2cm +  and 6cm +
Leila M. Shultz +
Ledebour +
decurrent +
compound +  and simple +
7 cm70 mm <br />0.07 m <br /> (10 cm100 mm <br />0.1 m <br />) +
5 cm50 mm <br />0.05 m <br /> (6 cm60 mm <br />0.06 m <br />) +
3 cm30 mm <br />0.03 m <br /> (7 cm70 mm <br />0.07 m <br />) +
lobed;linear;broadly lanceolate +
2cm;5cm +
fertile +  and bisexual +
zygomorphic +, actinomorphic +  and (3-)5-merous +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
winged +  and monomorphic +
fertile +  and bisexual +
fertile +  and bisexual +
Alta. +, B.C. +, Man. +, N.W.T. +, Nunavut +, Ont. +, Que. +, Sask. +, Yukon +, Alaska +, Idaho +, Mont. +, Oreg. +, Wash. +  and Asia (Russia) +
0–2000 m +
gland-dotted +
glabrous +  and tomentose +
peripheral +
winged +  and beaked +
dispersed +
Arctic and alpine tundra, sandy, rocky slopes near shorelines +
spiciform +  and racemiform +
in subcapitate clusters +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
campanulate +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
sessile +  and petiolate +
persistent +  and deciduous +
cauline +  and basal +
deltate +
entire +  and dentate +
2-carpellate +
persistent +
Flowering mid summer–early fall. +
2 +  and 20 +
Mém. Acad. Imp. Sci. St. Pétersbourg Hist. Acad. +
styliferous +, neuter +  and pistillate +
sterile +  and fertile +
conic;convex;conic;convex;flat +
2 +  and 5 +
exalbuminous +
1 +  and 3 +
wand-like +
appendaged +  and truncate +
papillate +
Artemisia hookeriana +, Artemisia hultenii +, Artemisia tilesii var. aleutica +, Artemisia tilesii var. elatior +, Artemisia tilesii subsp. gormanii +, Artemisia tilesii subsp. hultenii +, Artemisia tilesii var. unalaschcensis +, Artemisia unalaskensis var. aleutica +  and Artemisia vulgaris subsp. tilesii +
Artemisia tilesii +
Artemisia subg. Artemisia +
species +
funnel +  and subglobose +
cylindric +
fibrous-rooted +  and taprooted +
60 cm600 mm <br />0.6 m <br /> (80 cm800 mm <br />0.8 m <br />) +
20 cm200 mm <br />0.2 m <br /> (60 cm600 mm <br />0.6 m <br />) +
shrub +  and subshrub +