Threenerve Fleabane (var. subtrinervis) Erigeron subtrinervis var. subtrinervis variety
Threenerve Fleabane (var. subtrinervis) is a perennial wildflower native to the lower 48 states. A host for pollen-specialist native bees.
More about this plant
Erigeron subtrinervis, called the three-nerved daisy, the three-nerve fleabane, or the hairy showy daisy, is a North American species of flowering plants in the family Asteraceae. It grows in various mountains of western Canada and the western United States: Rocky Mountains, northern Cascades, Black Hills, etc., from British Columbia and Washington state east to North Dakota and south as far as New Mexico. Wikipedia →
Growing & care
USDA PLANTS · TRY- Hardiness
- ≥ zone 4 derived from its U.S. range
- Lifespan
- Perennial
Wildlife & pollinators
How pollinator value is scored →❧ Caterpillar hosts ~15 caterpillar species
Erigeron supports ~15 caterpillar species.
Native butterfly & moth caterpillars are the base of the terrestrial food web — most songbirds rear their young almost entirely on them. As a host for native Lepidoptera this is a moderate genus.
Recorded feeding on Erigeron in North America, including:
+ 8 more species → ↑ show fewer
✦ Bees specialist-bee host
Specialist native bees depend on it.
Some native bees are pollen specialists (oligolectic) — they raise young only on pollen from particular plant genera. Erigeron is a recorded specialist-bee host, so losing it can mean losing the bee that relies on it.
Related plants
More Erigeron →
Sources for this entry (12) Open & cited
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