Data sources

Each value Trefle shows for Poa trivialis, 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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Sourced19 Differs from sources1 Source not recorded11 Not on the record8 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.: 67 (1753)	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	1753	No source recorded	Source not recorded
Descriptive
Common name	Rough bluegrass	No source recorded	Source not recorded
Observations	Macaronesia, N. Africa, Temp. Eurasia	No source recorded	Source not recorded
Morphology
Average height	25 cm	25 cm · TRY Plant Trait Database · Measured · 245 observations · 2026-10-09 TRY 7.0 datasets 45, 50, 71, 80, 86, 88, 92, 108, 116, 164, 174, 175, 178, 203, 310, 347, 428, 589, 818, 863, 897, 898	Sourced
Biological type	hemicryptophyte	hemicryptophyte · TRY Plant Trait Database · Measured · 17 observations · 2026-10-09 TRY 7.0 datasets 4, 25, 71, 158, 164, 174, 175, 178, 203, 500, 918	Sourced
Flower color	empty	yellow · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 92	Not on the record
Flower conspicuous	false	No source recorded	Source not recorded
Foliage color	empty	green · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 92	Not on the record
Foliage texture	medium	medium · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Fruit color	empty	brown · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 92	Not on the record
Fruit conspicuous	false	No source recorded	Source not recorded
Fruit shape	caryopsis	caryopsis · TRY Plant Trait Database · Measured · 4 observations · 2026-10-09 TRY 7.0 datasets 4, 882	Sourced
Growth form	Bunch	Bunch · 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	Moderate	Moderate · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 92	Sourced
Maximum height	70 cm	70 cm · TRY Plant Trait Database · Measured · 4 observations · 2026-10-09 TRY 7.0 datasets 45, 50, 71, 80, 86, 88, 92, 108, 116, 164, 174, 175, 178, 203, 310, 347, 428, 589, 818, 863, 897, 898	Sourced
Sexuality	hermaphrodite	hermaphrodite · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 4, 365	Sourced
Vegetable	false	No source recorded	Source not recorded
Phenology
Bloom months	may, jun	may, jun · TRY Plant Trait Database · Measured · 19 observations · 2026-10-20 TRY 7.0 datasets 4, 45, 80, 174, 203 1 earlier or rejected value Superseded feb, may, jun · TRY Plant Trait Database · Measured · 19 observations · 2026-10-09 TRY 7.0 datasets 4, 45, 80, 174, 203	Sourced
Duration	perennial	perennial · TRY Plant Trait Database · Measured · 21 observations · 2026-10-09 TRY 7.0 datasets 4, 71, 86, 92, 110, 164, 175, 178, 203, 365, 460, 818, 882, 918	Sourced
Ecology
Atmospheric humidity	7 / 9 · humid air	7 / 9 · humid air · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Ground humidity	7 / 12 · wet, flooded a few weeks a year (hygrophilous)	7 / 12 · wet, flooded a few weeks a year (hygrophilous) · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 178, 203	Sourced
Light	5 / 9 · half-shade	7 / 9 · half-light to light · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 178, 489	Differs from sources
Nitrogen fixation	None	None · TRY Plant Trait Database · Measured · 7 observations · 2026-10-09 TRY 7.0 datasets 71, 110, 444, 445	Sourced
Ph maximum	pH 7.5	pH 7.5 · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Ph minimum	pH 4.8	pH 4.8 · 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 · 2 observations · 2026-10-09 TRY 7.0 datasets 178, 242	Sourced
Soil salinity	0 / 9 · absent from saline soils	0 / 9 · absent from saline soils · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 178, 489	Sourced
Cultivation
Minimum root depth	30 cm	30 cm · TRY Plant Trait Database · Measured · 4 observations · 2026-10-09 TRY 7.0 datasets 92, 818, 898	Sourced
Usda legacy
C n ratio	empty	16.3 · TRY Plant Trait Database · Measured · 23 observations · 2026-10-09 TRY 7.0 datasets 50, 88, 347, 412, 468, 670	Not on the record
Other
Propagation method	—	seed · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 92, 174	Not on the record
Salt tolerance	—	None · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 92	Not on the record
Soil ph indicator	—	6 · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 178, 203, 489	Not on the record
Temperature indicator	—	5 · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 203, 489	Not on the record

Poa trivialis L., 1753 54% complete

Rough bluegrass

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Data sources