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Berberidaceae family

Wilcox's Barberry Berberis wilcoxii

Native
Early-season nectar — Flowers in a late-winter / early-spring window when few other plants in our catalog bloom — valuable early forage for pollinators (relative to our catalog's bloom coverage).

Wilcox's Barberry is a perennial shrub native to the lower 48 states. It blooms Mar – Apr.

More about this plant

Berberis wilcoxii is a shrub native to Arizona, New Mexico and Sonora. It is up to 2 m tall, with pinnately compound leaves of 5-7 leaflets, densely clustered racemes and ovoid berries up to 10 mm long. It is generally found in rocky canyons in mountainous areas at an elevation of 1700–2500 m. Wikipedia →

Growing & care

USDA PLANTS · TRY
Conditions
Sources · Conditions
Cold hardiness (derived) — Hardiness
Hardiness
≥ zone 8 derived from its U.S. range
Size & form
Sources · Size & form
USDA PLANTS — Lifespan
Lifespan
Perennial
In the garden
Shrub layer — Sits in the shrub of a layered food forest or polyculture.Open guide →
derived roles
The garden year bloom → fruit → fall colour
J
F
M
A
M
J
J
A
S
O
N
D
Bloom
Bloom (the flower's colour)
Bloom · Mar – Apr — 20 obs · Herbarium specimens — Park et al. 2023 (CC BY 4.0)
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 →
❧ Caterpillar hosts ~12 caterpillar species

Berberis supports ~12 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 Berberis in North America, including:

Alypia octomaculata · Eight-Spotted Forester Cadra cautella · Fig-Moth Callosamia promethea · Promethea Moth Cheimophila salicella · concealer moth Coryphista meadii · geometer (inchworm) moth Hyalophora cecropia · Cecropia Moth
+ 8 more species →
Hyphantria cunea · tiger moth Lymantria dispar · Gypsy Moth Malacosoma americana · Eastern Tent Caterpillar Moth Omphalocera cariosa · snout moth Orgyia leucostigma · White-Marked Tussock Moth Plodia interpunctella · snout moth Pseudoglaea olivata · owlet moth Samia walkeri · giant silk moth
Keystone count (genus-level) from Warren II 2026 (CC0) · Tallamy host-use records. Named species (a documented Nearctic sample, not exhaustive) from NHM HOSTS (CC0).
✦ Bees 8 bee visitors
Visitor records (observations, not exhaustive) from Noori et al. 2026 (CC BY 4.0) · GloBI →
Wildlife & visitors 1 nectaring

Open records of who else uses Wilcox's Barberry — a generalist food-web signal, kept separate from the keystone Ecological Value.

1 adult butterfly & moth species is recorded nectaring at its flowers:

Vanessa cardui · Painted Lady
Interaction records (observations, not exhaustive) from GloBI → (CC0). Counts are distinct species; names are the most-recorded. Common names from Wikidata (CC0).
Species thumbnails re-hosted from iNaturalist — Creative Commons, credited per image (hover for credit). Click any species to see it on iNaturalist. Not exhaustive; many taxa have no openly-licensed photo yet.
Sources for this entry (15) 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
[06] Description — Wikipedia (CC BY-SA)
[07] Ecological value — Warren II 2026 (CC0) · Tallamy host-use counts
[09] Conservation rank — NatureServe Explorer (CC BY)
[10] Cold hardiness (derived) — Derived from U.S. range × USDA PHZM zones
[11] Wildlife & visitors — GloBI — Global Biotic Interactions (CC0)
[13] Flower-visitor value (derived) — Noori et al. 2026 (CC BY 4.0) · GloBI
[14] Caterpillar host count — Warren II 2026 (Dryad, CC0) · Tallamy host-use counts
[15] Caterpillar species — NHM HOSTS (CC0)
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