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Asteraceae family

Livermore Tarweed Deinandra bacigalupii

Native Specialist-bee host

Livermore Tarweed is an annual wildflower native to the lower 48 states. A host for pollen-specialist native bees.

More about this plant

Deinandra bacigalupii is a rare species of flowering plant in the family Asteraceae, known by the common names Livermore tarplant and Livermore moonshine. It is endemic to Alameda County, California, and is only found within a half-mile of the city limits of Livermore, in the eastern portion of the Livermore Valley. The plant is considered endangered under the California Endangered Species Act, and there are only four known populations; a fifth was destroyed by a landscaping business in 2014. The majority is located on city property near the Springtown neighborhood. It grows in open areas with alkali soils, in alkali meadows and on the edges of alkali sinks, and appears to be restricted to a soil called Solano fine sandy loam. This plant was previously included within Deinandra increscens ssp. increscens, but it was separated and elevated to species level in 1999. Wikipedia →

Growing & care

USDA PLANTS · TRY
Conditions
Sources · Conditions
Cold hardiness (derived) — Hardiness
Hardiness
≥ zone 11 derived from its U.S. range
Size & form
Sources · Size & form
USDA PLANTS — Lifespan
Lifespan
Annual
In the garden
Herb layer — Sits in the herb of a layered food forest or polyculture.Open guide →
derived roles
Species characteristics from USDA PLANTS (public domain) + TRY (CC BY) — general guidance, not a guarantee for your exact site. Deer "browsing" is documented palatability, not a deer-proof claim.

Wildlife & pollinators

How pollinator value is scored →
✦ 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. Deinandra is a recorded specialist-bee host, so losing it can mean losing the bee that relies on it.

Specialist hosts from Smith et al. 2024.
Sources for this entry (11) Open & cited
[01] Scientific name & family — USDA PLANTS (DwCA, Zenodo 17903503)
[02] Growth habit & duration — USDA PLANTS (DwCA, Zenodo 17903503)
[03] Native status & distribution — USDA PLANTS (DwCA, Zenodo 17903503)
[04] Common name — USDA PLANTS (via GBIF)
[05] Invasive / introduced status — USDA PLANTS (DwCA, Zenodo 17903503) — native status
[07] Description — Wikipedia (CC BY-SA)
[08] Ecological value — GloBI · Smith et al. 2024 (CC BY)
[09] Conservation rank — NatureServe Explorer (CC BY)
[10] Cold hardiness (derived) — Derived from U.S. range × USDA PHZM zones
[11] County range — GBIF Open Data — open-licensed occurrences (CC0/CC-BY) → county
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