Artemisia packardiae

J. W. Grimes & Ertter

Brittonia 31: 454, fig. 1. 1979.

Common names: Succor Creek mugwort
EndemicConservation concern
Treatment appears in FNA Volume 19. Treatment on page 531. Mentioned on page 504, 522.

Perennials, 20–50 (–60) cm, strongly aromatic (rhizomatous, fibrous-rooted). Stems 3–20, erect, light-brown, simple or branched, glabrous. Leaves cauline, dark green; blades lanceolate, 1.5–5 × 1–2.5 cm, 2-pinnatifid (primary lobes 5–9, 0.4–1.5 cm; cauline smaller, pinnatifid to entire), faces tomentose (abaxial) or glabrous (adaxial). Heads (peduncles 0 or to 3 mm) in usually paniculiform, sometimes racemiform, arrays 5–20 × 1.5–4 cm. Involucres campanulate to hemispheric, 2.5–3.5 × 2–4.5 mm. Phyllaries broadly ovate, glandular (at least at bases). Florets: pistillate 3–8; bisexual, sometimes functionally staminate, (15–) 20–35; corollas bright-yellow, 1.3–2.2 mm, glandular. Cypselae (light-brown) ellipsoid (± arcuate, ribs 4, prominent), ca. 1 mm, glandular. 2n = 18.


Phenology: Flowering late summer.
Habitat: Coarse taluses, alkaline soils, erosion gullies
Elevation: 1000–2400 m

Discussion

Artemisia packardiae is known only from southeastern Oregon, western Idaho, and northeastern Nevada. It is closely related to A. michauxiana and could be considered an ecologic variant.

Selected References

None.

Lower Taxa

None.
... more about "Artemisia packardiae"
not tailed +  and obtuse +
scarious +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Leila M. Shultz +
J. W. Grimes & Ertter +
decurrent +
compound +  and simple +
1.5 cm15 mm <br />0.015 m <br /> (5 cm50 mm <br />0.05 m <br />) +
2-pinnatifid;lanceolate +
1cm;2.5cm +
fertile +  and bisexual +
Succor Creek mugwort +
zygomorphic +, actinomorphic +  and (3-)5-merous +
bright-yellow +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
winged +  and monomorphic +
ellipsoid +
fertile +  and bisexual +
fertile +  and bisexual +
Idaho +, Nev. +  and Oreg. +
1000–2400 m +
gland-dotted +
glabrous +  and tomentose +
staminate +  and pistillate +
peripheral +
winged +  and beaked +
dispersed +
Coarse taluses, alkaline soils, erosion gullies +
spiciform +  and racemiform +
in subcapitate clusters +  and singly +
indeterminate +
5 cm50 mm <br />0.05 m <br /> (20 cm200 mm <br />0.2 m <br />) +
heterogamous +  and homogamous +
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
each +  and sessile +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
campanulate;hemispheric +
0.2 cm2 mm <br />0.002 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
sessile +  and petiolate +
dark green +
persistent +  and deciduous +
deltate +
entire +  and dentate +
2-carpellate +
persistent +
Flowering late summer. +
2 +  and 20 +
styliferous +, neuter +  and pistillate +
sterile +  and fertile +
conic;convex;conic;convex;flat +
2 +  and 5 +
exalbuminous +
Endemic +  and Conservation concern +
branched +  and simple +
light-brown +
3 +  and 20 +
wand-like +
appendaged +  and truncate +
papillate +
Artemisia sect. Abrotanum +
Artemisia packardiae +
Artemisia subg. Artemisia +
species +
funnel +  and subglobose +
cylindric +
fibrous-rooted +  and taprooted +
50 cm500 mm <br />0.5 m <br /> (60 cm600 mm <br />0.6 m <br />) +
20 cm200 mm <br />0.2 m <br /> (50 cm500 mm <br />0.5 m <br />) +
shrub +  and subshrub +