Helianthus pauciflorus Nutt., 1818 29% complete

Stiff sunflower

Gen. N. Amer. Pl. 2: 177 (1818)

Data sources

Each value Trefle shows for Helianthus pauciflorus, with what every source says about it. When sources disagree, the strongest source is shown (how sources are ranked). Values imported before sources were recorded one by one are marked Source not recorded.

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Sourced9 Source not recorded10 Not on the record4 Sources: TRY Plant Trait Database, Earlier Trefle data
Field Shown What the sources say
Core
Author Nutt. No source recorded
Source not recorded
Bibliography Gen. N. Amer. Pl. 2: 177 (1818) No source recorded
Source not recorded
Phylum Tracheophyta No source recorded
Source not recorded
Rank species No source recorded
Source not recorded
Status accepted No source recorded
Source not recorded
Year 1818 No source recorded
Source not recorded
Descriptive
Common name Stiff sunflower No source recorded
Source not recorded
Family common name Aster family No source recorded
Source not recorded
Observations Canada to N. & EC. U.S.A. No source recorded
Source not recorded
Morphology
Average height empty Not on the record
Biological type empty Not on the record
Flower color yellow
  • yellow · Earlier Trefle data · Reported · 2026-10-19
    value present before provenance tracking (2022 import), no source recorded
Sourced
Growth habit Forb/herb
  • Forb/herb · Earlier Trefle data · Reported · 2026-10-19
    value present before provenance tracking (2022 import), no source recorded
Sourced
Vegetable false No source recorded
Source not recorded
Phenology
Duration empty Not on the record
Ecology
Atmospheric humidity 4 / 9 · moderately dry air
  • 4 / 9 · moderately dry air · Earlier Trefle data · Reported · 2026-10-19
    value present before provenance tracking (2022 import), no source recorded
Sourced
Light 8 / 9 · light
  • 8 / 9 · light · Earlier Trefle data · Reported · 2026-10-19
    value present before provenance tracking (2022 import), no source recorded
Sourced
Ph maximum pH 8
  • pH 8 · Earlier Trefle data · Inferred · 2026-10-19
    value present before provenance tracking (2022 import), no source recorded derived from a Baseflor soil reaction class by the 2022 import, a class not a measurement
Sourced
Ph minimum pH 7.5
  • pH 7.5 · Earlier Trefle data · Inferred · 2026-10-19
    value present before provenance tracking (2022 import), no source recorded derived from a Baseflor soil reaction class by the 2022 import, a class not a measurement
Sourced
Soil nutriments 6 / 9 · rather rich (meso-eutrophic)
  • 6 / 9 · rather rich (meso-eutrophic) · Earlier Trefle data · Reported · 2026-10-19
    value present before provenance tracking (2022 import), no source recorded
Sourced
Soil salinity 0 / 9 · absent from saline soils
  • 0 / 9 · absent from saline soils · Earlier Trefle data · Reported · 2026-10-19
    value present before provenance tracking (2022 import), no source recorded
Sourced
Cultivation
Minimum root depth 134 cm Sourced
Usda legacy
C n ratio empty Not on the record