Data sources

Each value Trefle shows for Trifolium nigrescens, 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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Sourced14 Differs from sources2 Source not recorded9 Not on the record7 Sources: TRY Plant Trait Database, Earlier Trefle data

Field	Shown	What the sources say
Core
Author	Viv.	No source recorded	Source not recorded
Bibliography	Fl. Ital. Fragm.: 12 (1808)	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	1808	No source recorded	Source not recorded
Descriptive
Common name	Ball clover	No source recorded	Source not recorded
Observations	Azores, Medit. to Iran	No source recorded	Source not recorded
Morphology
Average height	54 cm	54.47 cm · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 92, 164	Differs from sources
Biological type	empty	therophyte · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 164	Not on the record
Flower color	white	white · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 92	Sourced
Flower conspicuous	true	true · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Foliage color	green	green · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 92	Sourced
Foliage texture	fine	fine · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 92	Sourced
Fruit color	black	black · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 92	Sourced
Fruit conspicuous	true	true · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Growth form	Single Crown	Single Crown · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Growth habit	Forb/herb	Forb/herb · 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	empty	30 cm · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 92, 164	Not on the record
Vegetable	false	No source recorded	Source not recorded
Phenology
Bloom months	apr, may, jun	apr\|may\|jun · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Differs from sources
Duration	annual	annual · TRY Plant Trait Database · Measured · 4 observations · 2026-10-09 TRY 7.0 datasets 92, 164, 460, 882	Sourced
Ecology
Nitrogen fixation	High	High · TRY Plant Trait Database · Measured · 5 observations · 2026-10-09 TRY 7.0 datasets 71, 92, 444	Sourced
Ph maximum	pH 6.9	pH 6.9 · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Ph minimum	pH 5.6	pH 5.6 · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Soil salinity	0 / 9 · absent from saline soils	0 / 9 · absent from saline soils · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Cultivation
Minimum root depth	empty	30 cm · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 92	Not on the record
Other
Human usage type	—	fodder · TRY Plant Trait Database · Reported · 1 observation · 2026-10-09 TRY 7.0 datasets 92	Not on the record
Propagation method	—	seed · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 92	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
Shade tolerance	—	None · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 92	Not on the record

Trifolium nigrescens Viv., 1808 41% complete

Ball clover

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Data sources