Silphium trifoliatum L. var. trifoliatum

vernacular whorled rosinweed — variety · Asteraceae

USDA: SITRT
GBIF: 4208619 syn.
Rank: variety

PlateNo public-domain or CC photograph located.

§2Habit & range

Growth habit: Forb/herb
Duration: Perennial
Group: Dicot
Family: Asteraceae Bercht. & J. Presl
Genus: Silphium

§2a

Native status, by region

L48 Lower 48 States Native

§2b

County-level range

· 121 counties across 9 states/territories

Legend Native · 121 Introduced · 0 Both · 0 Hover a county for detail.

§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