Data sources

Each value Trefle shows for Picea mariana, 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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Sourced13 Source not recorded12 Not on the record6 Sources: TRY Plant Trait Database, Earlier Trefle data

Field	Shown	What the sources say
Core
Author	(Mill.) Britton, Sterns & Poggenb.	No source recorded	Source not recorded
Bibliography	Prelim. Cat.: 71 (1888)	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	1888	No source recorded	Source not recorded
Descriptive
Common name	Black spruce	No source recorded	Source not recorded
Family common name	Pine family	No source recorded	Source not recorded
Observations	Subarctic America to NC. & NE. U.S.A.	No source recorded	Source not recorded
Morphology
Average height	650 cm	650 cm · TRY Plant Trait Database · Measured · 347 observations · 2026-10-09 TRY 7.0 datasets 20, 28, 68, 73, 92, 156, 241, 292, 460, 500, 662, 873, 909, 925	Sourced
Biological type	empty	macrophanerophyte · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 500	Not on the record
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	green	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 · 1 observation · 2026-10-09 TRY 7.0 datasets 92	Sourced
Fruit color	brown	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
Growth form	Single Stem	Single Stem · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Growth habit	Tree	Tree · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Growth rate	Slow	Slow · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 92	Sourced
Maximum height	2700 cm	2700 cm · TRY Plant Trait Database · Measured · 3 observations · 2026-10-09 TRY 7.0 datasets 20, 28, 68, 73, 92, 156, 241, 292, 460, 500, 662, 873, 909, 925	Sourced
Vegetable	false	No source recorded	Source not recorded
Phenology
Duration	perennial	perennial · TRY Plant Trait Database · Measured · 177 observations · 2026-10-09 TRY 7.0 datasets 28, 92, 424, 460, 818, 925	Sourced
Ecology
Nitrogen fixation	None	None · TRY Plant Trait Database · Measured · 47 observations · 2026-10-09 TRY 7.0 datasets 20, 57, 67, 73, 94, 110, 130, 445, 822	Sourced
Ph maximum	pH 6.5	pH 6.5 · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Ph minimum	pH 4.7	pH 4.7 · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Cultivation
Minimum root depth	53 cm	53 cm · TRY Plant Trait Database · Measured · 38 observations · 2026-10-09 TRY 7.0 datasets 73, 92, 432, 662, 818	Sourced
Usda legacy
C n ratio	empty	61.5 · TRY Plant Trait Database · Measured · 67 observations · 2026-10-09 TRY 7.0 datasets 79, 424, 981	Not on the record
Other
Human usage type	—	christmas_trees, fuelwood, lumber, naval_stores, nursery_stock, pulpwood · TRY Plant Trait Database · Reported · 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	—	Deep · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 92	Not on the record

Picea mariana (Mill.) Britton, Sterns & Poggenb., 1888 41% complete

Black spruce

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

Data sources