Data sources

Each value Trefle shows for Elymus repens, 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.

Sourced18 Differs from sources3 Source not recorded11 Not on the record9 Sources: TRY Plant Trait Database, Earlier Trefle data

Field	Shown	What the sources say
Core
Author	(L.) Gould	No source recorded	Source not recorded
Bibliography	Madroño 9: 127 (1947)	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	1947	No source recorded	Source not recorded
Descriptive
Common name	Quackgrass	No source recorded	Source not recorded
Observations	Temp. Eurasia, N. Africa	No source recorded	Source not recorded
Morphology
Average height	65 cm	65 cm · TRY Plant Trait Database · Measured · 345 observations · 2026-10-09 TRY 7.0 datasets 1, 7, 25, 28, 50, 66, 80, 86, 88, 90, 92, 108, 116, 164, 174, 175, 178, 203, 310, 488, 569, 776, 861, 863, 866, 897, 926	Sourced
Biological type	hemicryptophyte	hemicryptophyte · TRY Plant Trait Database · Measured · 15 observations · 2026-10-09 TRY 7.0 datasets 4, 25, 71, 164, 174, 175, 178, 203, 488, 918	Sourced
Flower color	green	yellow · TRY Plant Trait Database · Measured · 1 observation · 2026-10-20 TRY 7.0 datasets 92 1 earlier or rejected value Superseded yellow · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 92	Differs from sources
Flower conspicuous	false	No source recorded	Source not recorded
Foliage color	green	green · TRY Plant Trait Database · Measured · 1 observation · 2026-10-20 TRY 7.0 datasets 92 1 earlier or rejected value Superseded green · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 92	Sourced
Foliage texture	medium	medium · TRY Plant Trait Database · Measured · 3 observations · 2026-10-20 TRY 7.0 datasets 4, 71, 92 1 earlier or rejected value Superseded medium · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09 TRY 7.0 datasets 4, 71, 92	Sourced
Fruit color	brown	brown · TRY Plant Trait Database · Measured · 1 observation · 2026-10-20 TRY 7.0 datasets 92 1 earlier or rejected value Superseded brown · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 92	Sourced
Fruit conspicuous	false	No source recorded	Source not recorded
Fruit shape	caryopsis	caryopsis · TRY Plant Trait Database · Measured · 5 observations · 2026-10-20 TRY 7.0 datasets 4, 882 1 earlier or rejected value Superseded caryopsis · TRY Plant Trait Database · Measured · 5 observations · 2026-10-09 TRY 7.0 datasets 4, 882	Sourced
Growth form	Rhizomatous	Rhizomatous · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Growth habit	Graminoid	Graminoid · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Growth rate	Rapid	Rapid · TRY Plant Trait Database · Measured · 1 observation · 2026-10-20 TRY 7.0 datasets 92 1 earlier or rejected value Superseded Rapid · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 92	Sourced
Maximum height	120 cm	120 cm · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09 TRY 7.0 datasets 1, 7, 25, 28, 50, 66, 80, 86, 88, 90, 92, 108, 116, 164, 174, 175, 178, 203, 310, 488, 569, 776, 861, 863, 866, 897, 926	Sourced
Sexuality	empty	hermaphrodite · TRY Plant Trait Database · Measured · 1 observation · 2026-10-20 TRY 7.0 datasets 4 1 earlier or rejected value Superseded hermaphrodite · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 4	Not on the record
Vegetable	false	No source recorded	Source not recorded
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 1 earlier or rejected value Superseded feb, jun, jul, aug · TRY Plant Trait Database · Measured · 11 observations · 2026-10-09 TRY 7.0 datasets 4, 45, 80, 174, 203	Differs from sources
Duration	perennial	perennial · TRY Plant Trait Database · Measured · 53 observations · 2026-10-09 TRY 7.0 datasets 4, 7, 25, 28, 71, 86, 92, 110, 164, 175, 178, 203, 432, 460, 818, 882, 918, 925	Sourced
Ecology
Atmospheric humidity	5 / 9 · medium air humidity	5 / 9 · medium air humidity · 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 · 2026-10-20 TRY 7.0 datasets 489 1 earlier or rejected value Superseded 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	7 / 9 · half-light to light	7 / 9 · half-light to light · TRY Plant Trait Database · Measured · 1 observation · 2026-10-20 TRY 7.0 datasets 178 1 earlier or rejected value Superseded 7 / 9 · half-light to light · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 178	Sourced
Nitrogen fixation	None	None · TRY Plant Trait Database · Measured · 26 observations · 2026-10-20 TRY 7.0 datasets 1, 20, 57, 67, 71, 89, 96, 110, 130, 444, 445, 822 1 earlier or rejected value Superseded None · TRY Plant Trait Database · Measured · 26 observations · 2026-10-09 TRY 7.0 datasets 1, 20, 57, 67, 71, 89, 96, 110, 130, 444, 445, 822	Sourced
Ph maximum	pH 7.8	pH 7.8 · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Ph minimum	pH 5.2	pH 5.2 · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Soil nutriments	7 / 9 · rich (eutrophic)	7 / 9 · rich (eutrophic) · TRY Plant Trait Database · Measured · 1 observation · 2026-10-20 TRY 7.0 datasets 178 1 earlier or rejected value Superseded 7 / 9 · rich (eutrophic) · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 178	Sourced
Soil salinity	1 / 9 · barely saline (hyperoligohaline)	2 / 9 · very slightly saline (peroligohaline) · TRY Plant Trait Database · Measured · 2 observations · 2026-10-20 TRY 7.0 datasets 178, 489 1 earlier or rejected value Superseded 2 / 9 · very slightly saline (peroligohaline) · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 178, 489	Differs from sources
Cultivation
Minimum root depth	98 cm	98 cm · TRY Plant Trait Database · Measured · 6 observations · 2026-10-20 TRY 7.0 datasets 92, 432, 818, 898 1 earlier or rejected value Superseded 98 cm · TRY Plant Trait Database · Measured · 6 observations · 2026-10-09 TRY 7.0 datasets 92, 432, 818, 898	Sourced
Usda legacy
C n ratio	empty	12.9 · TRY Plant Trait Database · Measured · 18 observations · 2026-10-20 TRY 7.0 datasets 7, 50, 70, 88, 90, 412 1 earlier or rejected value Superseded 12.9 · TRY Plant Trait Database · Measured · 18 observations · 2026-10-09 TRY 7.0 datasets 7, 50, 70, 88, 90, 412	Not on the record
Other
Human usage type	—	fodder · TRY Plant Trait Database · Reported · 1 observation · 2026-10-20 TRY 7.0 datasets 92 1 earlier or rejected value Superseded fodder · TRY Plant Trait Database · Reported · 1 observation · 2026-10-09 TRY 7.0 datasets 92	Not on the record
Propagation method	—	vegetative · TRY Plant Trait Database · Measured · 3 observations · 2026-10-20 TRY 7.0 datasets 92, 174 1 earlier or rejected value Superseded vegetative · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09 TRY 7.0 datasets 92, 174	Not on the record
Salt tolerance	—	None · TRY Plant Trait Database · Measured · 1 observation · 2026-10-20 TRY 7.0 datasets 92 1 earlier or rejected value Superseded None · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 92	Not on the record
Shade tolerance	—	None · TRY Plant Trait Database · Measured · 16 observations · 2026-10-20 TRY 7.0 datasets 92, 174 1 earlier or rejected value Superseded None · TRY Plant Trait Database · Measured · 16 observations · 2026-10-09 TRY 7.0 datasets 92, 174	Not on the record
Soil ph indicator	—	6 · TRY Plant Trait Database · Measured · 1 observation · 2026-10-20 TRY 7.0 datasets 489 1 earlier or rejected value Superseded 6 · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 489	Not on the record
Temperature indicator	—	5 · TRY Plant Trait Database · Measured · 1 observation · 2026-10-20 TRY 7.0 datasets 489 1 earlier or rejected value Superseded 5 · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 489	Not on the record

Elymus repens (L.) Gould, 1947 56% complete

Quackgrass

.fa-secondary{opacity:.4} Data sources

Data sources