Artemisia arbuscula subsp. arbuscula

Endemic
Treatment appears in FNA Volume 19. Treatment on page 511.

Leaves broadly cuneate (lobed, lobes less than 1/2 blade lengths, 1–3 mm wide, rounded). Involucres 3.5–4(–5) × 2–4.5 mm. 2n = 18, 36.


Phenology: Flowering mid–late summer.
Habitat: Rocky sedimentary soils, high valleys, mountain slopes
Elevation: 1500–3800 m

Distribution

V19-863-distribution-map.gif

Calif., Colo., Idaho, Mont., Nev., Utah, Wash., Wyo.

Discussion

The relatively large heads of Artemisia arbuscula subsp. arbuscula suggest a relationship with A. cana; the extreme morphologic variability of this subspecies from east to west may be the result of hybridization with various subspecies within the A. cana complex.

Selected References

None.

Lower Taxa

None.

Leila M. Shultz +
Nuttall +
Tridentatae +
Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, Utah +, Wash. +  and Wyo. +
1500–3800 m +
Rocky sedimentary soils, high valleys, mountain slopes +
Flowering mid–late summer. +
Trans. Amer. Philos. Soc., n. s. +
Artemisia tridentata subsp. arbuscula +, Artemisia tridentata var. arbuscula +  and Seriphidium arbusculum +
Artemisia arbuscula subsp. arbuscula +
Artemisia arbuscula +
subspecies +