Plants compact mats, 3–10 dm wide. Aerial flowering-stems 0.2–0.8 dm. Leaf-blades oblanceolate to oblong, 1–2.5 × 0.5–1 cm. Inflorescences capitate, often reduced to single involucre; bracts 0.3–1 × 0.2–0.7 cm. Involucres 4–6 × 3–5 mm. Flowers 6–7 mm.

Phenology: Flowering Jul–Sep.
Habitat: Sandy, gravelly to rocky or talus slopes, high-elevation grassland, sagebrush, and tundra communities, alpine conifer woodlands
Elevation: (2600-)3000-4000(-4200) m

Distribution

• Generated Map
• Legacy Map

Colo.

Discussion

Variety xanthum is the subalpine to alpine expression of the species and is distributed along the backbone of the Colorado Rocky Mountains on many of the highest peaks (Chaffee, Clear Creek, Custer, El Paso, Fremont, Grand, Hinsdale, Huerfano, Lake, Larimer, Park, Saguache, Summit, and Teller counties). The plants are rather exquisite in the field and do well in cultivation.

Selected References

None.

Lower Taxa

None.

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