Carduus pycnocephalus L., 1763 39% complete

Slender thistle

Sp. Pl. ed. 2 2: 1151 (1763)

Data sources

Each value Trefle shows for Carduus pycnocephalus, 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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Sourced5 Differs from sources1 Source not recorded18 Not on the record3 Sources: TRY Plant Trait Database
Field Shown What the sources say
Core
Author L. No source recorded
Source not recorded
Bibliography Sp. Pl. ed. 2 2: 1151 (1763) 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 1763 No source recorded
Source not recorded
Descriptive
Common name Slender thistle No source recorded
Source not recorded
Family common name Aster family No source recorded
Source not recorded
Observations Macaronesia, Europe to W. Pakistan and Arabian Pen., N. Africa No source recorded
Source not recorded
Morphology
Average height 30 cm
  • 30 cm · TRY Plant Trait Database · Measured · 33 observations · 2026-10-09
    TRY 7.0 datasets 164, 175, 249, 251, 581, 655, 882, 918
Sourced
Biological type therophyte
  • therophyte · TRY Plant Trait Database · Measured · 5 observations · 2026-10-09
    TRY 7.0 datasets 164, 175, 655, 918
Sourced
Flower color purple Differs from sources
Fruit color empty Not on the record
Fruit shape achene Sourced
Growth habit Forb/herb No source recorded
Source not recorded
Maximum height 100 cm
  • 100 cm · TRY Plant Trait Database · Measured · 5 observations · 2026-10-09
    TRY 7.0 datasets 164, 175, 249, 251, 581, 655, 882, 918
Sourced
Vegetable false No source recorded
Source not recorded
Phenology
Bloom months may, jun No source recorded
Source not recorded
Duration annual, biennial
  • annual, biennial · TRY Plant Trait Database · Measured · 13 observations · 2026-10-09
    TRY 7.0 datasets 164, 882, 918
Sourced
Ecology
Atmospheric humidity 3 / 9 · rather dry air No source recorded
Source not recorded
Light 8 / 9 · light No source recorded
Source not recorded
Nitrogen fixation empty Not on the record
Ph maximum pH 7 No source recorded
Source not recorded
Ph minimum pH 6.5 No source recorded
Source not recorded
Soil nutriments 7 / 9 · rich (eutrophic) No source recorded
Source not recorded
Soil salinity 0 / 9 · absent from saline soils No source recorded
Source not recorded
Usda legacy
C n ratio empty Not on the record