Stems ± retrorsely hairy. Thyrses: axis glabrous or retrorsely hairy; proximal bract margins entire. Flowers: calyx lobes (4.5–)5–8 × 1.5–2.5 mm, margins erose, rarely lacerate, narrowly to broadly scarious, apex acute to acuminate; corolla (10–)13–20 mm; pollen sacs (0.6–)0.8–1.1 mm. 2n = 32.

Phenology: Flowering Jun–Aug.
Habitat: Sagebrush shrublands, aspen woodlands.
Elevation: 1800–3200 m.

Distribution

• Generated Map
• Legacy Map

Ariz., Colo., Idaho, Mont., Utah, Wyo.

Discussion

Variety aggregatus is known from the Rocky Mountains from central Idaho and western Montana to north-central and western Wyoming, north-central Colorado, and central Utah. The variety is sympatric with var. rydbergii in north-central Colorado and south-central Wyoming; some plants from that area are difficult to assign to variety with confidence.

Selected References

None.

Lower Taxa

None.