Flora of North America species comparison

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Artemisia suksdorfii

Artemisia biennis

coastal mugwort, coastal wormwood, Suksdorf sagewort, Suksdorf's mugwort, Suksdorf's sagewort, Suksdorf's wormwood

armoise bisannuelle, biennial sagewort, biennial wormwood
Habit Perennials, 50–170(–200) cm, aromatic (rhizomes woody, coarse). Annuals or biennials, (10–)30–80(–150) cm, not aromatic.
Stems

usually 10+, erect, light brown, simple, usually glabrous.

1, erect, often reddish, simple (finely striate), glabrous.
Leaves

cauline (sessile), bicolor (white and dark green);

blades lanceolate, 5–10(–15) × 1–5 cm (bases strongly tapered, attenuate), coarsely and irregularly lobed, faces tomentose (abaxial) or glabrous (adaxial).

cauline, green or yellow-green (sessile);

blades broadly lanceolate to ovate, 4–10(–13) × 1.5–4 cm, 1–2-pinnately lobed (ultimate lobes coarsely toothed), faces glabrous.
Involucres

narrowly turbinate or globose, 1.5–2.5 × 1–1.5 mm.

globose, 2–4 × (1.5–)2–4 mm.
Florets

pistillate 2–5;

bisexual 2–7;

corollas yellow, 1.5–3 mm, glabrous.

pistillate 6–25;

bisexual 15–40;

corollas pale yellow, ca. 2 mm, glabrous.
Phyllaries

(straw-colored to yellow-green, shiny) lanceolate, glabrous or sparsely hairy.

(green) broadly elliptic to obovate, glabrous.
Heads

(erect) in crowded (proximally leafy), paniculiform or racemiform arrays 17–30 × (2–)4–5 cm (lateral branches stiff, erect).

(erect, subsessile) in (leafy) paniculiform to spiciform arrays 12–35(–40) × 2–4 cm (lateral branches relatively short).
Cypselae

ellipsoid, 0.8–1.5 mm, glabrous.

ellipsoid (4–5-nerved), 0.2–0.9 mm, glabrous.
2n

= 18.

= 18.

Artemisia suksdorfii

Artemisia biennis
Phenology Flowering mid summer–fall. Flowering mid summer–late fall.
Habitat Coastal habitats, often along roads or drainages Disturbed habitats, margins of vernal pools, desert flats, usually clay or silty soils
Elevation 0–200 m (0–700 ft) 600–2000 m (2000–6600 ft)
Distribution
from FNA
CA; OR; WA; BC
[WildflowerSearch map]
[BONAP county map]
from FNA
AK; AZ; CA; CO; CT; DE; IA; ID; IL; IN; KS; KY; MA; MD; ME; MI; MN; MO; MT; ND; NE; NH; NJ; NM; NV; NY; OH; OR; PA; RI; SD; UT; VT; WA; WI; WV; WY; AB; BC; MB; NB; NS; NT; ON; PE; QC; SK; YT [Introduced in Europe, Pacific Islands (New Zealand)]
[WildflowerSearch map]
[BONAP county map]
Discussion

Artemisia suksdorfii is similar morphologically to A. douglasiana; it has more and smaller heads, and glabrous phyllaries. The two species hybridize where their ranges overlap.

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

Artemisia biennis is naturalized and weedy in the eastern portion of its range. It is morphologically similar to A. annua, differing primarily in the coarser leaf lobes and larger heads that are sessile in axils of leaflike bracts. Artemisia biennis is considered native to the northwest United States; it may be introduced in other parts of its range. The type specimen is a horticultural specimen from New Zealand.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 19, p. 533. FNA vol. 19, p. 523.
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. 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. tilesii, A. tridentata, A. tripartita, A. vulgaris
A. abrotanum, A. absinthium, A. alaskana, A. aleutica, A. annua, A. arbuscula, 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
Synonyms A. heterophylla, A. vulgaris var. littoralis A. biennis var. diffusa
Name authority Piper: Bull. Torrey Bot. Club 28: 42. (1901) Willdenow: Phytographia, 11. (1794)
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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