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big sagebrush

black sagebrush

Habit Shrubs evergreen, 2–30 dm, crowns rounded or flat-topped; taprooted. Shrubs evergreen, 1–3(5) dm.
Stems

canescent or tomentose.

glabrous to tomentose or glandular-puberulent.

Leaves

cauline; wedge-shaped, 0.5–3.5 cm;

tips shallowly 3-lobed;

surfaces densely gray-canescent or tomentose.

cauline, usually wedge-shaped, 0.2–2 cm;

tips obtuse to 3-lobed;

surfaces canescent to tomentose or glandular-puberulent;

petioles gradually or abruptly tapered.

Inflorescences

panicle-like.

narrow panicle-like arrays.

Involucres

cylindric to campanulate, 1–4 mm.

short-cylindric to ovoid, 2–3 mm.

Receptacles

glabrous.

glabrous.

Florets

3–8(11); bisexual.

2–6.

Phyllaries

in several unequal series, triangular to lanceolate or elliptic; outer gradually shorter;

margins membranous;

tips acute or obtuse;

surfaces tomentose.

in 3–5 unequal series; ovate to elliptic;

margins membranous;

tips acute or obtuse;

surfaces outer puberulent; inner glabrous, resinous; shiny.

Fruits

1–2 mm, pubescent or glabrous.

1–1.5 mm, glabrous or resinous.

Heads

discoid; erect, sessile or peduncled.

discoid; erect, sessile or peduncled.

2n

=18, 36.

=18, 36.

Artemisia tridentata

Artemisia nova

Distribution
[WildflowerSearch map]
[BONAP county map]
[WildflowerSearch map]
[BONAP county map]
Discussion

Western North America. 4 subspecies; 3 subspecies treated in Flora.

Shrublands, flats, slopes. Flowering Jun–Sep. 1200–1500 m. BR, Owy. CA, ID, NV; northeast to MT, east to CO, southeast to NM. Native.

Source Flora of Oregon, volume 2, page 194
Kenton Chambers
Flora of Oregon, volume 2, page 192
Kenton Chambers
Sibling taxa
A. abrotanum, A. absinthium, A. arbuscula, A. biennis, A. campestris, A. cana, A. douglasiana, A. dracunculus, A. estesii, A. ludoviciana, A. michauxiana, A. nova, A. packardiae, A. papposa, A. pycnocephala, A. rigida, A. spiciformis, A. spinescens, A. suksdorfii, A. tilesii, A. tripartita, A. vulgaris
A. abrotanum, A. absinthium, A. arbuscula, A. biennis, A. campestris, A. cana, A. douglasiana, A. dracunculus, A. estesii, A. ludoviciana, A. michauxiana, A. packardiae, A. papposa, A. pycnocephala, A. rigida, A. spiciformis, A. spinescens, A. suksdorfii, A. tilesii, A. tridentata, A. tripartita, A. vulgaris
Subordinate taxa
A. tridentata ssp. tridentata, A. tridentata ssp. vaseyana, A. tridentata ssp. wyomingensis
Synonyms Artemisia arbuscula ssp. nova, Artemisia arbuscula var. nova
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