Index / Search / Pseudolysimachion longifolium
§1 Plant
Pseudolysimachion longifolium (L.) Opiz
vernacular longleaf speedwell — species · Scrophulariaceae
§2Habit & range
Habit and range
- Growth habit
- Forb/herb
- Duration
- Perennial
- Group
- Dicot
- Family
- Scrophulariaceae Juss.
- Genus
- Pseudolysimachion
Native status, by region
- AK Alaska Introduced
- CAN Canada Introduced
- L48 Lower 48 States Introduced
County-level range
· 113 counties across 20 states/territories§3Cultivation
No cultivation specs.
USDA has not characterised this taxon. Roughly four out of five plants in the database lack the detailed cultivation record present here — typically because they have not been the focus of NRCS Plant Materials work. Range and distribution data are unaffected.
§4Counties, by state
Recorded in 113 counties across 20 states/territories.
Alaska view state ↗ 2 I ▾
Illinois view state ↗ 2 I ▾
Indiana view state ↗ 1 I ▾
Kentucky view state ↗ 3 I ▾
Maine view state ↗ 9 I ▾
Massachusetts view state ↗ 11 I ▾
Michigan view state ↗ 10 I ▾
Minnesota view state ↗ 4 I ▾
Missouri view state ↗ 1 I ▾
Montana view state ↗ 2 I ▾
New Hampshire view state ↗ 4 I ▾
New Jersey view state ↗ 3 I ▾
New York view state ↗ 18 I ▾
North Dakota view state ↗ 1 I ▾
Pennsylvania view state ↗ 16 I ▾
Rhode Island view state ↗ 2 I ▾
Vermont view state ↗ 7 I ▾
West Virginia view state ↗ 1 I ▾
§5Sources & provenance
USDA PLANTS
Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.
plants.usda.gov/PSLO6 ↗GBIF Backbone
Canonical taxonomic identity, synonym resolution, cross-refs. CC0.
gbif.org/species/7553264 ↗Record version
Cached and built locally. Source version on this record:
usda-plants-mt-2026-05-26
fetched 2026-05-26T09:28:40Z