Data sources

Each value Trefle shows for Helianthus tuberosus, 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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Sourced23 Source not recorded10 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.: 905 (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	Jerusalem-artichoke	No source recorded	Source not recorded
Family common name	Aster family	No source recorded	Source not recorded
Observations	C. & E. Canada to U.S.A.	No source recorded	Source not recorded
Morphology
Average height	185 cm	185 cm · TRY Plant Trait Database · Measured · 14 observations · 2026-10-09 TRY 7.0 datasets 25, 90, 92, 164, 178, 500, 671, 818, 882, 918	Sourced
Biological type	geophyte	geophyte · TRY Plant Trait Database · Measured · 10 observations · 2026-10-09 TRY 7.0 datasets 4, 25, 71, 164, 178, 500, 918	Sourced
Flower color	yellow	yellow · TRY Plant Trait Database · Measured · 4 observations · 2026-10-09 TRY 7.0 datasets 4, 92, 882	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	empty	green, yellow · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 92	Not on the record
Foliage texture	coarse	coarse · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Fruit color	grey	grey · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 92, 882	Sourced
Fruit conspicuous	false	No source recorded	Source not recorded
Fruit shape	achene	achene · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09 TRY 7.0 datasets 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	Forb/herb	Forb/herb · 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 · 2026-10-09 TRY 7.0 datasets 92	Sourced
Maximum height	250 cm	250 cm · TRY Plant Trait Database · Measured · 5 observations · 2026-10-09 TRY 7.0 datasets 25, 90, 92, 164, 178, 500, 671, 818, 882, 918	Sourced
Sexuality	empty	hermaphrodite · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 4	Not on the record
Vegetable	true	true · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Phenology
Bloom months	jul, oct	jul, oct · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 4, 163	Sourced
Duration	perennial	perennial · TRY Plant Trait Database · Measured · 15 observations · 2026-10-09 TRY 7.0 datasets 4, 25, 71, 92, 164, 178, 818, 882, 918	Sourced
Ecology
Atmospheric humidity	8 / 9 · very humid air	8 / 9 · very 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, 242	Sourced
Light	8 / 9 · light	8 / 9 · light · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 178, 489	Sourced
Nitrogen fixation	None	None · TRY Plant Trait Database · Measured · 5 observations · 2026-10-09 TRY 7.0 datasets 67, 71, 444, 445	Sourced
Ph maximum	pH 7	pH 7 · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Ph minimum	pH 4	pH 4 · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Soil nutriments	8 / 9 · very rich (pereutrophic)	8 / 9 · very rich (pereutrophic) · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 178	Sourced
Soil salinity	0 / 9 · absent from saline soils	0 / 9 · absent from saline soils · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09 TRY 7.0 datasets 178, 242, 489	Sourced
Cultivation
Minimum root depth	119 cm	119 cm · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09 TRY 7.0 datasets 92, 818	Sourced
Usda legacy
C n ratio	empty	15 · TRY Plant Trait Database · Measured · 4 observations · 2026-10-09 TRY 7.0 datasets 90, 412	Not on the record
Other
Salt tolerance	—	Low · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 92	Not on the record
Shade tolerance	—	Intermediate · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 92	Not on the record
Soil ph indicator	—	8 · TRY Plant Trait Database · Measured · 2 observations · 2026-10-09 TRY 7.0 datasets 178, 242	Not on the record
Temperature indicator	—	7 · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 242	Not on the record

Helianthus tuberosus L., 1753 52% complete

Jerusalem-artichoke

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Data sources