Asclepias syriaca L., 1762 35% complete

Common milkweed

Sp. Pl. ed. 2: 214 (1762)

Data sources

Each value Trefle shows for Asclepias syriaca, 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.

Something wrong? Suggest a correction.

Sourced9 Differs from sources4 Source not recorded9 Not on the record7 Sources: TRY Plant Trait Database, Earlier Trefle data
Field Shown What the sources say
Core
Author L. No source recorded
Source not recorded
Bibliography Sp. Pl. ed. 2: 214 (1762) 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 1762 No source recorded
Source not recorded
Descriptive
Common name Common milkweed No source recorded
Source not recorded
Observations C. & E. Canada to C. & E. U.S.A. No source recorded
Source not recorded
Morphology
Average height 106 cm
  • 105.75 cm · TRY Plant Trait Database · Measured · 114 observations · 2026-10-09
    TRY 7.0 datasets 28, 48, 50, 66, 116, 133, 203, 251, 569, 664, 853, 866, 918, 925, 926
Differs from sources
Biological type hemicryptophyte
  • hemicryptophyte · TRY Plant Trait Database · Measured · 225 observations · 2026-10-09
    TRY 7.0 datasets 4, 203, 500, 918, 925
Sourced
Flower color purple Differs from sources
Foliage texture empty Not on the record
Fruit shape empty Not on the record
Growth habit Forb/herb
  • Forb/herb · Earlier Trefle data · Reported · 2026-10-19
    value present before provenance tracking (2022 import), no source recorded
Sourced
Sexuality empty Not on the record
Vegetable false No source recorded
Source not recorded
Phenology
Bloom months jun, jul, aug Differs from sources
Duration perennial
  • perennial · TRY Plant Trait Database · Measured · 234 observations · 2026-10-09
    TRY 7.0 datasets 4, 25, 28, 48, 71, 110, 203, 759, 918, 925
Sourced
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
Ground humidity empty
  • 5 / 12 · fresh, never flooded (mesohydric) · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09
    TRY 7.0 datasets 489
Not on the record
Light 8 / 9 · light Sourced
Nitrogen fixation None
  • None · TRY Plant Trait Database · Measured · 10 observations · 2026-10-09
    TRY 7.0 datasets 20, 57, 71, 96, 444, 445, 822
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) · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09
    TRY 7.0 datasets 489
Sourced
Soil salinity 0 / 9 · absent from saline soils
  • 1 / 9 · barely saline (hyperoligohaline) · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09
    TRY 7.0 datasets 489
Differs from sources
Usda legacy
C n ratio empty Not on the record
Other
Soil ph indicator — Not on the record
Temperature indicator — Not on the record