Flora of North America species comparison

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Artemisia alaskana

Artemisia packardiae

Alaska wormwood, alaskan sagebrush, Siberian wormwood

Packard's artemisia, Packard's wormwood, Succor Creek mugwort
Habit Perennials or subshrubs, 15–30(–60) cm (not cespitose), aromatic (caudices woody). Perennials, 20–50(–60) cm, strongly aromatic (rhizomatous, fibrous-rooted).
Stems

1–10, erect, gray-green, simple (suffrutescent from woody offsets), densely hairy to glabrescent.

3–20, erect, light brown, simple or branched, glabrous.
Leaves

basal and cauline, mostly gray-green;

blades obovate, 1.5–5 × 0.5–1.5 cm, 3-lobed to 2-ternately lobed (lobes 0.5–3 mm wide, margins flat; cauline leaves smaller, sometimes entire), faces tomentose.

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).
Involucres

broadly campanulate, 3.5–5 × 6–9 mm.

campanulate to hemispheric, 2.5–3.5 × 2–4.5 mm.
Florets

pistillate 8–10;

bisexual 20–45;

corollas yellow, 2–2.5 mm, glabrous or glandular.

pistillate 3–8;

bisexual, sometimes functionally staminate, (15–)20–35;

corollas bright yellow, 1.3–2.2 mm, glandular.
Phyllaries

ovate (margins brownish or hyaline), tomentose.

broadly ovate, glandular (at least at bases).
Heads

(peduncles 0 or to 30 mm) in (leafy) paniculiform to racemiform arrays 12–25 × 1–4.5 cm.

(peduncles 0 or to 3 mm) in usually paniculiform, sometimes racemiform, arrays 5–20 × 1.5–4 cm.
Cypselae

ellipsoid (flattened), 1–1.5 mm, glabrous.

(light brown) ellipsoid (± arcuate, ribs 4, prominent), ca. 1 mm, glandular.
2n

= 18.

= 18.

Artemisia alaskana

Artemisia packardiae
Phenology Flowering early–late summer. Flowering late summer.
Habitat Well-drained soils, flood plains, gravel stream banks, roadsides, dry, rocky slopes, forest openings, alpine and arctic tundras Coarse taluses, alkaline soils, erosion gullies
Elevation 100–2500 m (300–8200 ft) 1000–2400 m (3300–7900 ft)
Distribution
from FNA
AK; BC; NT; YT
from FNA
ID; NV; OR
[BONAP county map]
Discussion

As circumscribed here, Artemisia alaskana is known from northwestern North America. The type specimen of A. alaskana is atypical, with longer peduncles and narrower leaf lobes than are found in most populations.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

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.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 19, p. 523. FNA vol. 19, p. 531.
Parent taxa Asteraceae > tribe Anthemideae > Artemisia > subg. Artemisia Asteraceae > tribe Anthemideae > Artemisia > subg. Artemisia
Sibling taxa
A. abrotanum, A. absinthium, A. aleutica, A. annua, A. arbuscula, A. biennis, A. bigelovii, A. borealis, A. californica, A. campestris, A. cana, A. carruthii, A. douglasiana, A. dracunculus, A. filifolia, A. franserioides, A. frigida, A. furcata, A. globularia, A. glomerata, A. laciniata, A. longifolia, A. ludoviciana, A. michauxiana, A. nesiotica, A. norvegica, A. nova, A. packardiae, A. palmeri, A. papposa, A. pattersonii, A. pedatifida, A. pontica, A. porteri, A. pycnocephala, A. pygmaea, A. rigida, A. rothrockii, A. rupestris, A. scopulorum, A. senjavinensis, A. serrata, A. spiciformis, A. stelleriana, A. suksdorfii, A. tilesii, A. tridentata, A. tripartita, A. vulgaris
A. abrotanum, A. absinthium, A. alaskana, A. aleutica, A. annua, A. arbuscula, A. biennis, A. bigelovii, A. borealis, A. californica, A. campestris, A. cana, A. carruthii, A. douglasiana, A. dracunculus, A. filifolia, A. franserioides, A. frigida, A. furcata, A. globularia, A. glomerata, A. laciniata, A. longifolia, A. ludoviciana, A. michauxiana, A. nesiotica, A. norvegica, A. nova, A. palmeri, A. papposa, A. pattersonii, A. pedatifida, A. pontica, A. porteri, A. pycnocephala, A. pygmaea, A. rigida, A. rothrockii, A. rupestris, A. scopulorum, A. senjavinensis, A. serrata, A. spiciformis, A. stelleriana, A. suksdorfii, A. tilesii, A. tridentata, A. tripartita, A. vulgaris
Synonyms A. tyrrellii
Name authority Rydberg: in N. L. Britton et al., N. Amer. Fl. 34: 281. (1916) J. W. Grimes & Ertter: Brittonia 31: 454, fig. 1. (1979)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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