Taxonomy

Division:

Magnoliophyta | - Flowering plants

Family:

Asteraceae

Genus:

Cirsium

Species:

Cirsium vallis-demonii subsp. vallis-demonii

Growth Characteristics

Growth Habit:

Forb/herb

Height:

100 cm

Drought Tolerance:

Medium

Bloom Months:

jun,jul,aug

Bloom Colors:

pink, purple

Keystone Species Ranking

Pollen Specialist Bee Keystone:

★★★★☆ Native pollen specialist bee species supported by this genus (NWF)

Garden & Ecology Notes

Wildlife Value:

bees, butterflies, birds

Fire Ecology:

Fire adapted — tolerates or benefits from fire

Fire Notes:

Adapted to periodic fire in California grasslands. Resprouts from root crown after burning and may show enhanced flowering following fire disturbance.

Source: Claude claude-sonnet-4-5-20250929 Batch

Propagation & Germination

Stratification:

Cold/moist stratification required — 30–60 days

Germination Time:

14–30 days

Notes:

Seeds require light for germination. Surface sow or barely cover.

Source: Claude claude-sonnet-4-5-20250929 Batch