Flora of North America species comparison

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Artemisia palmeri

Artemisia franserioides

Palmer sagewort, San Diego sagewort

bursage mugwort, ragweed sagebrush
Habit Subshrubs, 100–350 cm, mildly aromatic. Biennials or perennials, 30–100 cm, faintly aromatic (rhizomatous).
Stems

usually 1–15, erect, brown, simple (wandlike, brittle, bases woody), glabrous.

1–3, erect, reddish brown, simple (leafy), glabrous or glabrate.
Leaves

cauline (petiolate), bicolor (gray-green and dark green);

blades broadly lanceolate, 3.5–12(–15) × 0.2–10 cm, relatively deeply and coarsely pinnately lobed (lobes 3–7+), faces canescent (abaxial) or glabrous or sparsely hairy (adaxial).

basal (in rosettes, petiolate) and cauline, bicolor (white and green);

blades ovate, 3–7(–20) × 2–4(–6) cm, 2–3-pinnately-lobed (lobes elliptic, 2–6 mm wide; cauline sessile, smaller), faces tomentose (abaxial) or glabrous or glabrescent (adaxial), glandular.
Involucres

globose, 2.5–3.5 × 2–5 mm.

broadly ovate, 3–5 × 4–5(–6) mm.
Florets

pistillate 0;

bisexual 8–30;

corollas pale yellow, 1.5–2.2 mm, resinous-glandular (style branches exsert, truncate, erose).

pistillate 4–5(–13), (1–1.5 mm);

bisexual 25–35;

corollas yellow, 1.5–2 mm, glabrous.
Phyllaries

(pale green to stramineous) broadly ovate, glabrous or sparsely hairy (receptacles paleate).

broadly ovate, sparsely hairy.
Heads

(erect or nodding, peduncles relatively slender) in open, paniculiform arrays, 15–40 × 3–10 cm (widely branched).

(nodding, peduncles 0 or 2) in paniculiform to racemiform arrays 10–35 × 2–4 cm (often 1-sided).
Cypselae

(light brown, shiny) ellipsoid, 1–1.2 mm, (4-angled), glabrous or glandular.

elliptic, 0.5–0.8 mm, glabrous.
2n

= 18.

Artemisia palmeri

Artemisia franserioides
Phenology Flowering early–mid summer. Flowering late summer–early fall.
Habitat Ravines, coastal areas, sandy soils Open coniferous forests, mid to upper montane
Elevation 100–300 m (300–1000 ft) 2200–3100 m (7200–10200 ft)
Distribution
from FNA
CA; Mexico (Baja California)
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; CO; NM; Mexico (Chihuahua)
[WildflowerSearch map]
[BONAP county map]
Discussion

Of conservation concern.

Artemisia palmeri is known only from drainages near the coast, from northeast of San Diego to just south of Ensenada. Most of its habitat has been destroyed by urban development. It is of particular interest because of its paleate receptacles, an anomalous trait that confounds our understanding of its evolutionary relationship to other species of Artemisia.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 19. FNA vol. 19, p. 525.
Parent taxa Asteraceae > tribe Anthemideae > Artemisia > subg. Artemisia Asteraceae > tribe Anthemideae > Artemisia > subg. Artemisia
Sibling taxa
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. packardiae, 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. 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
Synonyms Artemisiastrum palmeri
Name authority A. Gray: Proc. Amer. Acad. Arts 11: 79. (1876) Greene: Bull. Torrey Bot. Club 10: 42. (1883)
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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