Flora of North America species comparison

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Artemisia nesiotica

Artemisia furcata

island sagebrush

fork wormwood, three-fork mugwort, three-fork wormwood
Habit Subshrubs, 10–60 cm (rounded), aromatic. Perennials, 7–35 cm (not cespitose), faintly aromatic (not rhizomatous, taproots stout, caudices simple or branched, branches clothed with persistent leaf bases).
Stems

relatively numerous, ascending or prostrate, gray, simple or branched (slender, wandlike, soft, bases woody and brittle), densely canescent.

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

cauline, gray-green;

blades linear-oblong, 3–5 × 1–2 cm, mostly 3-lobed (lobes 1–2 mm wide), faces gray-hairy.

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

broadly campanulate, 2.5 × 4–4.5 mm.

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

pistillate 0;

bisexual 20–50;

corollas pale yellow, 1.2–1.5 mm, glandular.

pistillate 6–7;

bisexual 15–26;

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

broadly ovate, densely hairy.

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

(usually erect, sometimes nodding) in (leafy) paniculiform arrays 10–25 × 3–5(–7) cm.

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

(light brown) ellipsoid (ribbed), 0.5 mm, resinous.

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

= 18, 36, 72, 90.

Artemisia nesiotica

Artemisia furcata
Phenology Flowering mid–late summer. Flowering late summer.
Habitat Rocky slopes, often fog-shrouded hillsides Talus slopes or tundra
Elevation 0–100 m (0–300 ft) 500–2700 m (1600–8900 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from FNA
AK; WA; AB; BC; NT; NU; YT; Asia
[WildflowerSearch map]
[BONAP county map]
Discussion

Artemisia nesiotica is known only from the Channel Islands of California. It differs from the closely related A. californica by its shorter stature, wider leaf lobes, and larger heads.

(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. 530. 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. 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 Crossostephium insulare, A. californica var. insularis A. furcata var. heterophylla, A. hyperborea, A. tacomensis, A. trifurcata
Name authority P. H. Raven: Aliso 5: 341. (1963) 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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