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cut-leaf sagebrush, three-tip sagebrush

long-leaf sage, longleaf sagebrush, longleaf wormwood

Habit Shrubs, 5–15 or 20–150(–200) cm, aromatic; root-sprouting (caudices with adventitious buds, fibrous rooted). Perennials, 20–80 cm (not cespitose), pleasantly aromatic (fibrous-rooted, rootstocks relatively short, horizontal, layered stems sometimes sprouting).
Stems

pale gray, glabrous.

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

Leaves

deciduous, gray-green;

blades broadly cuneate, 1.5–4 × 0.5–2 cm, deeply 3-lobed (lobes 1–1.4 mm wide, acute; cauline leaves smaller, mostly 3-lobed).

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).

Involucres

globose or turbinate, 2–4 × 1.5–3 mm.

campanulate, 4–5 × 4–5 mm.

Florets

3–11;

corollas 2–2.5 mm, glandular (style branches included).

pistillate 3–10;

bisexual 8–26;

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

Phyllaries

broadly lanceolate (margins scarious, obscured by indument), canescent.

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

Heads

in paniculiform or spiciform arrays (5–)8–15(–35) × (0.5–)1–5 cm.

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

Cypselae

(columnar, unequally ribbed) 1.8–2.3 mm, glabrous or resinous.

ellipsoid, 0.5–0.8 mm, glabrous.

2n

= 36.

Artemisia tripartita

Artemisia longifolia

Phenology Flowering mid summer–early fall.
Habitat Alkaline flats, grasslands, barren areas, high plains
Elevation 500–1800 m (1600–5900 ft)
Distribution
from FNA
ID; NV; OR; WA; WY; BC
[WildflowerSearch map]
[BONAP county map]
from FNA
ID; MN; MT; ND; NE; SD; WY; AB; BC; MB; SK
[WildflowerSearch map]
[BONAP county map]
Discussion

Subspecies 2 (2 in the flora).

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

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.)

Key
1. Shrubs 20–150(–200) cm; lobes of leaves linear, to 0.5 mm wide; loamy soils, w of continental divide
subsp. tripartita
1. Shrubs 5–15 cm; lobes of leaves lanceolate, 1–1.5 mm wide; stony grasslands, e Wyoming
subsp. rupicola
Source FNA vol. 19, p. 518. FNA vol. 19, p. 527.
Parent taxa Asteraceae > tribe Anthemideae > Artemisia > subg. Tridentatae 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. suksdorfii, A. tilesii, A. tridentata, 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. 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
Subordinate taxa
A. tripartita subsp. rupicola, A. tripartita subsp. tripartita
Synonyms A. trifida, A. tridentata subsp. trifida, Seriphidium tripartitum A. ludoviciana var. integrifolia, A. natronensis, A. vulgaris subsp. longifolia, A. vulgaris var. longifolia
Name authority Rydberg: Mem. New York Bot. Gard. 1: 432. (1900) Nuttall: Gen. N. Amer. Pl. 2: 142. (1818)
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