Flora of North America species comparison

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Artemisia tripartita subsp. tripartita
Photo is of parent taxon

cut-leaf sagebrush, three-tip sagebrush
Habit Shrubs, 20–150(–200) cm.
Leaves

1.5–4 × 0.5–1.5 cm, lobes linear, to 0.5 mm wide.
Involucres

2–3 × 2 mm.
Florets

4–8.
Heads

in spiciform arrays (6–)8–15(–35) × (1–)4–5 cm.
Cypselae

1.8–2.3 mm.
2n

= 18, 36.

Artemisia tripartita subsp. tripartita
Phenology Flowering mid summer–late fall.
Habitat Deep loam soils, usually igneous in origin
Elevation 900–1900 m (3000–6200 ft)
Distribution
from FNA
ID; NV; OR; WA; WY; BC
[BONAP county map]
Discussion

Subspecies tripartita ranges throughout the Snake River and Columbia River basins, extending north through central British Columbia, where average annual precipitation is 375–800 mm. Because much of the range includes fertile agricultural land, much of the habitat has been lost to farming, and populations of subsp. tripartita occur as isolated islands along drainages and at the bases of mountain slopes. It may be one of the parents involved in the presumed hybrid origin of Artemisia arbuscula subsp. thermopola.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 19, p. 518.
Parent taxa Asteraceae > tribe Anthemideae > Artemisia > subg. Tridentatae > Artemisia tripartita
Sibling taxa
A. tripartita subsp. rupicola
Name authority unknown
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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