Table 5. Summary of each column included in the leaf trait dataset, including column number, column name, data format, data units, and a short description.

Col.	Col. name	Format	Units	Range	Description
1	PROJECT	categorical	—	—	Project name
2	YEAR	numerical	year	2000–2014	Sampling year
3	MONTH	numerical	month	5–10	Sampling month
4	DAY	numerical	day	1–31	Sampling day
5	ECOREGION	categorical	—	—	EPA Level III Ecoregion
6	CLUSTER	categorical	—	—	General sampling area
7	PLOT_ID	numerical	—	1–1,014	Plot identification number
8	LATITIDE	numerical	decimal degree	37.7844–45.9477	Plot latitude (WGS84)
9	LONGITUDE	numerical	decimal degree	−123.9038–−117.1309	Plot longitude (WGS84)
10	LAI_O	numerical	m2 m−2	0–14.7	Overstory leaf area index
11	HEIGHTC	numerical	m	1–54	Plot-average canopy height
12	PFT	categorical	—	—	Plant function type
13	DIVISION	categorical	—	—	Angiosperm or gymnosperm
14	GENUS	categorical	—	—	Genus name
15	SPECIES	categorical	—	—	Species name
16	COMMON_NAME	categorical	—	—	Species common name
17	LEAF_PSA	numerical	cm2	1–557	Leaf projected surface area (PSA)
18	PSA_to_HSA	numerical	—	1.00–1.57	Coefficient converting PSA to HSA
19	LEAF_HSA	numerical	cm2	2–557	Leaf hemisurface area (HSA)
20	LEAF_DRY_WT	numerical	g	0.01–3.88	Leaf sample dry weight
21	LEAF_CARBON_WT	numerical	g C	0.005–1.741	Leaf sample carbon weight
22	SLA_PSA	numerical	cm2 PSA g−1 C	27–1004	Specific leaf area based on PSA
23	SLA_HSA	numerical	cm2 HSA g−1 C	43–1,146	Specific leaf area based on HSA
24	LEAF_CARBON	numerical	%	38–57	Leaf carbon mass fraction
25	LEAF_NITROGEN	numerical	%	0.45–3.89	Leaf nitrogen mass fraction
26	LEAF_CN	numerical	—	12–112	Leaf carbon to nitrogen mass ratio
27	LEAF_LIFE	numerical	year	1–26	Leaf lifespan
28	NOTES	categorical	—	—	General notes