Taxonomy

Division:

Magnoliophyta | - Flowering plants

Family:

Asteraceae

Genus:

Cirsium

Species:

Cirsium barnebyi

Growth Characteristics

Life Cycle:

Perennial

Growth Habit:

Forb/herb

Height:

1-2 ft

Light Requirements:

Full Sun

Drought Tolerance:

High

Bloom Months:

jun, jul, aug, sep

Bloom Colors:

Pink, Purple

Native Range

United States: Colorado, Utah, Wyoming

Keystone Species Ranking

Bee Keystone:

★★☆☆☆ Based on number of native bee species using this genus for pollen and nectar (Source: National Wildlife Federation)

Soil Requirements

Soil Type:

rocky, well-drained calcareous soil

pH:

7.0 - 8.0 (neutral to slightly alkaline)

Drainage:

excellent drainage required

Moisture:

dry to moderate

Notes:

native to limestone outcrops and rocky slopes