Artemisia arbuscula subsp. longiloba

(Osterhout) L. M. Shultz

Sida 21: 1637. 2005.

Basionym: Artemisia spiciformis var. longiloba Osterhout Muhlenbergia 4: 69. 1908
Synonyms: Artemisia longiloba (Osterhout) Beetle Seriphidium arbusculum subsp. longilobum (Osterhout) W. A. Weber
Treatment appears in FNA Volume 19. Treatment on page 511. Mentioned on page 512.
Revision as of 18:39, 24 September 2019 by FNA>Volume Importer

Leaves broadly cuneate (4–10 × 2–5 mm, often irregularly lobed, lobes rounded, middle lobes overlapping lateral lobes). Involucres 2–3 × 1.5–2.5 mm. 2n = 18, 36.


Phenology: Flowering early–late spring.
Habitat: Clay soils of alkaline basins and valleys, occasionally on outwash plains of mountains
Elevation: 1500–2500 m

Distribution

V19-864-distribution-map.gif

Calif., Colo., Idaho, Mont., Oreg., Utah, Wyo.

Discussion

Subspecies longiloba is distinguished from other members of the Artemisia arbuscula complex by its early blooming time. It is the only member of subg. Tridentatae to begin flowering as snow melts in early spring, and it is ecologically distinguished from other subspecies by its occurrence at low elevations, in fine-grained clay soils.

Selected References

None.

Lower Taxa

None.
Leila M. Shultz +
(Osterhout) L. M. Shultz +
Artemisia spiciformis var. longiloba +
Calif. +, Colo. +, Idaho +, Mont. +, Oreg. +, Utah +  and Wyo. +
1500–2500 m +
Clay soils of alkaline basins and valleys, occasionally on outwash plains of mountains +
Flowering early–late spring. +
Artemisia longiloba +  and Seriphidium arbusculum subsp. longilobum +
Artemisia arbuscula subsp. longiloba +
Artemisia arbuscula +
subspecies +