Cirsium arvense (L.) Scop., 1771 41% complete

California thistle

Fl. Carniol., ed. 2, 2: 126 (1771)

Data sources

Each value Trefle shows for Cirsium arvense, 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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Sourced13 Differs from sources3 Source not recorded12 Not on the record8 Sources: TRY Plant Trait Database, Flora of North America, Plants For A Future
Field Shown What the sources say
Core
Author (L.) Scop. No source recorded
Source not recorded
Bibliography Fl. Carniol., ed. 2, 2: 126 (1771) 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 1771 No source recorded
Source not recorded
Descriptive
Common name California thistle No source recorded
Source not recorded
Family common name Aster family No source recorded
Source not recorded
Observations Temp. Eurasia, NW. Africa No source recorded
Source not recorded
Morphology
Average height 90 cm
  • 82.95 cm · TRY Plant Trait Database · Measured · 244 observations · 2026-10-09
    TRY 7.0 datasets 25, 28, 45, 50, 66, 80, 86, 88, 108, 116, 133, 164, 175, 178, 203, 236, 251, 449, 500, 526, 581, 617, 655, 706, 716, 779, 818, 863, 866, 897, 898, 902, 918
  • 90 cm · Plants For A Future · Reported · 2026-09-04
2 earlier or rejected values
  • Superseded 82.95 cm · TRY Plant Trait Database · Measured · 244 observations · 2026-10-09
    TRY 7.0 datasets 25, 28, 45, 50, 66, 80, 86, 88, 108, 116, 133, 164, 175, 178, 203, 236, 251, 449, 500, 526, 581, 617, 655, 706, 716, 779, 818, 863, 866, 897, 898, 902, 918
  • Superseded 82.95 cm · TRY Plant Trait Database · Measured · 244 observations · 2026-09-17
    TRY 7.0 datasets 25, 28, 45, 50, 66, 80, 86, 88, 108, 116, 133, 164, 175, 178, 203, 236, 251, 449, 500, 526, 581, 617, 655, 706, 716, 779, 818, 863, 866, 897, 898, 902, 918
Sourced
Biological type geophyte
  • geophyte · TRY Plant Trait Database · Measured · 18 observations · 2026-10-09
    TRY 7.0 datasets 4, 25, 71, 164, 174, 175, 178, 203, 500, 655, 902, 918
2 earlier or rejected values
  • Superseded geophyte · TRY Plant Trait Database · Measured · 18 observations · 2026-10-09
    TRY 7.0 datasets 4, 25, 71, 164, 174, 175, 178, 203, 500, 655, 902, 918
  • Superseded geophyte · TRY Plant Trait Database · Measured · 18 observations · 2026-09-17
    TRY 7.0 datasets 4, 25, 71, 164, 174, 175, 178, 203, 500, 655, 902, 918
Sourced
Edible part roots, stem, leaves
  • roots|stem|leaves · Plants For A Future · Reported · 2026-09-04
Differs from sources
Flower color white, purple
  • magenta, purple · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09
    TRY 7.0 datasets 4, 655, 882
  • white|purple · Flora of North America · Reported · 2026-09-04
2 earlier or rejected values
  • Superseded magenta, purple · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09
    TRY 7.0 datasets 4, 655, 882
  • Superseded magenta, purple · TRY Plant Trait Database · Measured · 3 observations · 2026-09-17
    TRY 7.0 datasets 4, 655, 882
Differs from sources
Foliage color green
2 earlier or rejected values
  • Superseded green · TRY Plant Trait Database · Measured · 6 observations · 2026-10-09
    TRY 7.0 datasets 236, 443, 879
  • Superseded green · TRY Plant Trait Database · Measured · 6 observations · 2026-09-17
    TRY 7.0 datasets 236, 443, 879
Sourced
Foliage texture coarse
2 earlier or rejected values
  • Superseded coarse · TRY Plant Trait Database · Measured · 4 observations · 2026-10-09
    TRY 7.0 datasets 4, 71, 236, 443, 879
  • Superseded coarse · TRY Plant Trait Database · Measured · 4 observations · 2026-09-17
    TRY 7.0 datasets 4, 71, 236, 443, 879
Sourced
Fruit color empty
2 earlier or rejected values
Not on the record
Fruit shape achene
2 earlier or rejected values
Sourced
Growth habit Forb/herb
  • Forb/herb · Flora of North America · Reported · 2026-09-04
Sourced
Maximum height 120 cm
  • 120 cm · TRY Plant Trait Database · Measured · 5 observations · 2026-10-09
    TRY 7.0 datasets 25, 28, 45, 50, 66, 80, 86, 88, 108, 116, 133, 164, 175, 178, 203, 236, 251, 449, 500, 526, 581, 617, 655, 706, 716, 779, 818, 863, 866, 897, 898, 902, 918
  • 120 cm · Flora of North America · Reported · 2026-09-04
2 earlier or rejected values
  • Superseded 120 cm · TRY Plant Trait Database · Measured · 5 observations · 2026-10-09
    TRY 7.0 datasets 25, 28, 45, 50, 66, 80, 86, 88, 108, 116, 133, 164, 175, 178, 203, 236, 251, 449, 500, 526, 581, 617, 655, 706, 716, 779, 818, 863, 866, 897, 898, 902, 918
  • Superseded 120 cm · TRY Plant Trait Database · Measured · 5 observations · 2026-09-17
    TRY 7.0 datasets 25, 28, 45, 50, 66, 80, 86, 88, 108, 116, 133, 164, 175, 178, 203, 236, 251, 449, 500, 526, 581, 617, 655, 706, 716, 779, 818, 863, 866, 897, 898, 902, 918
Sourced
Sexuality dioecious
2 earlier or rejected values
Sourced
Phenology
Bloom months jun, jul, aug, sep
  • jun, jul, aug · TRY Plant Trait Database · Measured · 11 observations · 2026-10-20
    TRY 7.0 datasets 4, 45, 80, 174, 203
  • jun|jul|aug|sep · Flora of North America · Reported · 2026-09-04
3 earlier or rejected values
  • Superseded feb, jun, jul, aug · TRY Plant Trait Database · Measured · 11 observations · 2026-10-09
    TRY 7.0 datasets 4, 45, 80, 174, 203
  • Superseded feb, jun, jul, aug · TRY Plant Trait Database · Measured · 11 observations · 2026-10-09
    TRY 7.0 datasets 4, 45, 80, 174, 203
  • Superseded feb, jun, jul, aug · TRY Plant Trait Database · Measured · 11 observations · 2026-09-17
    TRY 7.0 datasets 4, 45, 80, 174, 203
Differs from sources
Duration perennial
  • perennial · TRY Plant Trait Database · Measured · 51 observations · 2026-10-09
    TRY 7.0 datasets 4, 25, 48, 71, 86, 110, 164, 175, 178, 203, 236, 365, 443, 460, 818, 879, 882, 918, 925
  • perennial · Flora of North America · Reported · 2026-09-04
2 earlier or rejected values
  • Superseded perennial · TRY Plant Trait Database · Measured · 51 observations · 2026-10-09
    TRY 7.0 datasets 4, 25, 48, 71, 86, 110, 164, 175, 178, 203, 236, 365, 443, 460, 818, 879, 882, 918, 925
  • Superseded perennial · TRY Plant Trait Database · Measured · 51 observations · 2026-09-17
    TRY 7.0 datasets 4, 25, 48, 71, 86, 110, 164, 175, 178, 203, 236, 365, 443, 460, 818, 879, 882, 918, 925
Sourced
Ecology
Ground humidity 5 / 12 · fresh, never flooded (mesohydric)
  • 5 / 12 · fresh, never flooded (mesohydric) · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09
    TRY 7.0 datasets 178, 203, 489
2 earlier or rejected values
  • Superseded 5 / 12 · fresh, never flooded (mesohydric) · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09
    TRY 7.0 datasets 178, 203, 489
  • Superseded 5 / 12 · fresh, never flooded (mesohydric) · TRY Plant Trait Database · Measured · 3 observations · 2026-09-17
    TRY 7.0 datasets 178, 203, 489
Sourced
Light empty
2 earlier or rejected values
Not on the record
Nitrogen fixation None
  • None · TRY Plant Trait Database · Measured · 11 observations · 2026-10-09
    TRY 7.0 datasets 20, 57, 71, 89, 444, 445
2 earlier or rejected values
  • Superseded None · TRY Plant Trait Database · Measured · 11 observations · 2026-10-09
    TRY 7.0 datasets 20, 57, 71, 89, 444, 445
  • Superseded None · TRY Plant Trait Database · Measured · 11 observations · 2026-09-17
    TRY 7.0 datasets 20, 57, 71, 89, 444, 445
Sourced
Soil nutriments 7 / 9 · rich (eutrophic)
  • 7 / 9 · rich (eutrophic) · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09
    TRY 7.0 datasets 178, 242
2 earlier or rejected values
  • Superseded 7 / 9 · rich (eutrophic) · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09
    TRY 7.0 datasets 178, 242
  • Superseded 7 / 9 · rich (eutrophic) · TRY Plant Trait Database · Measured · 2 observations · 2026-09-17
    TRY 7.0 datasets 178, 242
Sourced
Soil salinity empty
  • 1 / 9 · barely saline (hyperoligohaline) · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09
    TRY 7.0 datasets 242
2 earlier or rejected values
  • Superseded 1 / 9 · barely saline (hyperoligohaline) · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09
    TRY 7.0 datasets 242
  • Superseded 1 / 9 · barely saline (hyperoligohaline) · TRY Plant Trait Database · Measured · 1 observation · 2026-09-17
    TRY 7.0 datasets 242
Not on the record
Cultivation
Minimum root depth 111 cm
2 earlier or rejected values
Sourced
Raw
Dissemination raw wind No source recorded
Source not recorded
Pollinisation raw insects (bees, flies, lepidoptera, beetles) No source recorded
Source not recorded
Sexuality raw dioecious No source recorded
Source not recorded
Usda legacy
C n ratio empty
  • 19.3 · TRY Plant Trait Database · Measured · 16 observations · 2026-10-09
    TRY 7.0 datasets 50, 88, 228, 412, 617, 670
2 earlier or rejected values
  • Superseded 19.3 · TRY Plant Trait Database · Measured · 16 observations · 2026-10-09
    TRY 7.0 datasets 50, 88, 228, 412, 617, 670
  • Superseded 19.3 · TRY Plant Trait Database · Measured · 16 observations · 2026-09-17
    TRY 7.0 datasets 50, 88, 228, 412, 617, 670
Not on the record
Other
Propagation method —
2 earlier or rejected values
  • Superseded seed, vegetative · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09
    TRY 7.0 datasets 174
  • Superseded seed, vegetative · TRY Plant Trait Database · Measured · 1 observation · 2026-09-17
    TRY 7.0 datasets 174
Not on the record
Shade tolerance —
2 earlier or rejected values
Not on the record
Soil ph indicator —
2 earlier or rejected values
Not on the record
Temperature indicator —
2 earlier or rejected values
Not on the record