Contra Costa Goldfields 🛑 Endangered

Lasthenia conjugens

Native to:
United States

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Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Asteraceae
Genus:
Lasthenia
Species:
Lasthenia conjugens
USDA Symbol:
LACO6

Growth Characteristics

Life Cycle:
Annual
Growth Habit:
Forb/herb
Height:
30 cm
Light Requirements:
Full Sun
Drought Tolerance:
Low
Bloom Months:
mar,apr,may,jun
Bloom Colors:
yellow

Wildlife Benefits

Bees:
★☆☆☆☆ Documented bee visitation (GBIF)
Butterflies & Moths:
★☆☆☆☆ Documented Lepidoptera association (GBIF)

Keystone Species Ranking

Pollen Specialist Bee Keystone:
★★★☆☆ Native pollen specialist bee species supported by this genus (NWF)

Garden & Ecology Notes

Wildlife Value:
bees, butterflies

Soil Requirements

Soil Type:
clay-rich, seasonally wet, nutrient-poor soil
pH:
5.5 - 7.5 (slightly acidic to neutral)
Drainage:
tolerates poor drainage
Moisture:
seasonally moist to wet
Notes:
often found in vernal pools and wetlands

Propagation & Germination

Stratification:
None required
Germination Time:
7–21 days
Notes:
Seeds germinate readily with moisture; adapted to vernal pool hydrology with winter-wet conditions.

The above propagation data sourced from Claude AI

Pre-treatment: Cold-moist stratification for 30 days at 1–5°C (34–41°F).

Source: Claude AI