Ipomopsis aggregata (Pursh) V.E. Grant ssp. aggregata

vernacular scarlet gilia — subspecies · Polemoniaceae

USDA: IPAGA3
GBIF: 7223721
Rank: subspecies

scarlet gilia (Ipomopsis aggregata ssp. aggregata) — Platephotograph · Nate MartineauCC BY-NC source · iNaturalist ↗

§2Habit & range

Growth habit: Forb/herb
Duration: Biennial, Perennial
Group: Dicot
Family: Polemoniaceae Juss.
Genus: Ipomopsis

§2a

Native status, by region

CAN Canada Native
L48 Lower 48 States Native

§2b

County-level range

· 10 counties across 1 state

Legend Native · 10 Introduced · 0 Both · 0 Hover a county for detail.

§3Cultivation specs · USDA

Recorded by the USDA Plant Materials Program.

§3a

Tolerances

Drought: High
Shade: High
Moisture use: Low
Fire: None
Salinity: Low
Anaerobic: Low
CaCO₃: High
Hedging: None

§3b

Climate & soil

Cold tolerance: -18 °F minimum
Frost-free days: 140 min.
Precipitation: 10–15 in/yr
pH range: 7–8.5
Root depth: 6 in min.
Fertility need: Low
Soil texture: coarse, medium, fine

§3c

Form & growth

Growth form: Single Stem
Growth rate: Rapid
Lifespan: Moderate
Mature height: 3 ft
Foliage texture: Coarse
Foliage colour: Green
Porosity (summer): Porous
Porosity (winter): Porous
Flower colour: Red
Fire resistant: No
N fixation: None
Toxicity: None

§3d

Reproduction

Bloom period: Late Spring
Seed abundance: Medium
Seed begins: Summer
Seed ends: Fall
Spread rate: Moderate
Stratify: No
Seeds / lb: 450,008
Propagation: seed

§3e

Use & availability

Commercial availability: Routinely Available
Nursery stock: Yes
Browse palatability: Low
Graze palatability: Low
Palatable, human: No
Protein potential: Low
Lumber: No
Christmas tree: No

§4Counties, by state

Recorded in 10 counties across 1 state.

Montana view state ↗ 10 N ▾

§5Sources & provenance

USDA PLANTS

Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.

plants.usda.gov/IPAGA3 ↗

GBIF Backbone

Canonical taxonomic identity, synonym resolution, cross-refs. CC0.

gbif.org/species/7223721 ↗

Record version

Cached and built locally. Source version on this record:

usda-plants-mt-2026-05-25

fetched 2026-05-25T18:27:19Z