Flora of North America species comparison

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Artemisia longifolia

Artemisia furcata

long-leaf sage, longleaf sagebrush, longleaf wormwood

fork wormwood, three-fork mugwort, three-fork wormwood
Habit Perennials, 20–80 cm (not cespitose), pleasantly aromatic (fibrous-rooted, rootstocks relatively short, horizontal, layered stems sometimes sprouting). Perennials, 7–35 cm (not cespitose), faintly aromatic (not rhizomatous, taproots stout, caudices simple or branched, branches clothed with persistent leaf bases).
Stems

3–20+, erect, gray-green, usually simple, sometimes branched (bases woody), densely tomentose.

(flowering) 1–5, erect, light brown, simple, strigillose or glabrate.
Leaves

cauline, bicolor (white and green);

blades linear to lanceolate, 3–12 × 1 cm, margins usually entire, sometimes toothed or lobed, faces densely tomentose (abaxial) or glabrate (adaxial).

basal (in rosettes) and cauline, gray-green;

blades oval, 2–10(–12) cm (basal) or 1–1.5 × 0.4–0.6 cm (cauline), 1–3-palmately lobed, faces sparsely to densely strigillose.
Involucres

campanulate, 4–5 × 4–5 mm.

broadly campanulate, 3–6 × 4.5–8 mm.
Florets

pistillate 3–10;

bisexual 8–26;

corollas pale yellow, 1–2 mm, sparsely glandular.

pistillate 6–7;

bisexual 15–26;

corollas mostly yellow, sometimes red-tinged, 1–2 mm, glabrous or glabrate.
Phyllaries

ovate-lanceolate (margins hyaline), densely to sparsely tomentose.

(greenish, color often obscured by indument) ovate or lanceolate (margins dark brown), sparsely to densely tomentose.
Heads

(peduncles 0 or to 2 mm) in mostly racemiform arrays 8–13 × 1–2 cm.

(erect or spreading, some nodding, peduncles 0 or to 30 mm) in racemiform or spiciform arrays 1–6 × 1–2 cm.
Cypselae

ellipsoid, 0.5–0.8 mm, glabrous.

oblong (ribbed), 1–1.5 mm, glabrous.
2n

= 36.

= 18, 36, 72, 90.

Artemisia longifolia

Artemisia furcata
Phenology Flowering mid summer–early fall. Flowering late summer.
Habitat Alkaline flats, grasslands, barren areas, high plains Talus slopes or tundra
Elevation 500–1800 m (1600–5900 ft) 500–2700 m (1600–8900 ft)
Distribution
from FNA
ID; MN; MT; ND; NE; SD; WY; AB; BC; MB; SK
[WildflowerSearch map]
[BONAP county map]
from FNA
AK; WA; AB; BC; NT; NU; YT; Asia
[WildflowerSearch map]
[BONAP county map]
Discussion

Artemisia longifolia appears to be more salt-tolerant than most species of the genus. It is closely related to A. ludoviciana.

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

Artemisia furcata extends from the islands of the Bering Sea into southern and interior Alaska, parts of Canada (disjunct in British Columbia and the northernmost Rocky Mountains of Alberta), and on Mt. Rainier in Washington. The array of names applied to A. furcata shows the taxonomic confusion arising from a myriad of morphologic variants that may indicate introgression with other species.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 19, p. 527. 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. 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. 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. ludoviciana var. integrifolia, A. natronensis, A. vulgaris subsp. longifolia, A. vulgaris var. longifolia A. furcata var. heterophylla, A. hyperborea, A. tacomensis, A. trifurcata
Name authority Nuttall: Gen. N. Amer. Pl. 2: 142. (1818) M. Bieberstein: Fl. Taur.-Caucas. 3: 567. (1819)
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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