Artemisia rothrockii

A. Gray in W. H. Brewer et al.
in W. H. Brewer et al., Bot. California 1: 618. 1876.
Common names: Rothrock or sticky sagebrush
Endemic
Synonyms: Artemisia tridentata subsp. rothrockii (A. Gray) H. M. Hall & Clements Seriphidium rothrockii (A. Gray) W. A. Weber
Treatment appears in FNA Volume 19. Treatment on page 515. Mentioned on page 503, 510, 511.

Shrubs, 20–50 cm (sticky-resinous and dark green throughout), pungently aromatic; not root-sprouting (trunks relatively narrow). Stems white (becoming dark gray with age), canescent (bark exfoliating). Leaves persistent, light or dark gray-green; blades long-cuneate to lanceolate, (0.4–)1–1.5(–2) × 0.2–0.4 cm, 3-lobed (lobes to 1/3 blade lengths, rounded, margins sometimes entire, somewhat wavy), faces densely to sparsely canescent, gland-dotted, sticky-resinous. Heads (erect, sessile or pedunculate) in paniculiform arrays, 5–15 × 1–2(–3) cm. Involucres broadly ovoid, 3–5 × 4–6 mm. Phyllaries (usually gray-green) ovate, densely or sparsely canescent. Florets 12–20; corollas 2.5–3.5 mm. Cypselae 0.8–2 mm, (smooth), resinous. 2n = 36, 54, 72.


Phenology: Flowering mid summer–all.
Habitat: Clay soils of mountain meadows
Elevation: 2500–3100 m

Discussion

Artemisia rothrockii is known only from the central and southern Sierra Nevada and the White Mountains of California. In the Rocky Mountains, A. spiciformis has been confused with A. rothrockii. Distinctive chemistry and anatomical structure of the leaves support the distinctness of A. rothrockii (L. M. Shultz 1986b). Intermediate characteristics suggest a hybrid origin from races of A. cana and A. tridentata.

Selected References

None.

Lower Taxa

None.

... more about "Artemisia rothrockii"
Leila M. Shultz +
A. Gray in W. H. Brewer et al. +
Tridentatae +
Rothrock or sticky sagebrush +
2500–3100 m +
Clay soils of mountain meadows +
Flowering mid summer–all. +
in W. H. Brewer et al., Bot. California +
Artemisia tridentata subsp. rothrockii +  and Seriphidium rothrockii +
Artemisia rothrockii +
Artemisia subg. Tridentatae +
species +