The Nature LibraryEN·ES
NL·0153PlantsSapindaceaeTree90,922 field observations
Sugar mapleNL·0153
Plate 1 of 8. (c) Michael John Oldham, some rights reserved (CC BY-NC), uploaded by Michael John Oldham · via iNaturalist

Herbarium of the Nature Library

Name
Acer saccharum
Family
Sapindaceae
Native to
Eastern Canada and north-eastern and central United States
Habitat
Temperate broadleaf forest
IUCN LC · Least concern

Sugar maple

Acer saccharum

Also calledIninaatig (Ojibwe) · Érable à sucre (French) · Arce azucarero (Spanish) · Zuckerahorn (German) · 糖槭 tángqì (Chinese)

The source of maple syrup and the blaze of New England autumns. On spring days after freezing nights, pressure changes inside the wood push sugary sap out of any wound, and about 40 litres of sap boil down to one litre of syrup.

Acer saccharum, the sugar maple, is a species of flowering plant in the soapberry and lychee family, Sapindaceae. It may also be called rock maple, sugar tree, sweet maple, or, particularly in reference to the wood, hard maple. Wikipedia

§1

What it can do

  1. iFlows sap during freeze–thaw cycles, when gas pressure in the wood fibres pushes sap from wounds
  2. iiLifts water from deep soil at night and releases it into dry topsoil (hydraulic lift), which helps nearby plants
  3. iiiTurns brilliant red, orange and yellow in autumn as chlorophyll breaks down and anthocyanins form
  4. ivTolerates deep shade as a sapling, waiting decades for a canopy gap
§2

At the table

Edible
Edible with care
Not eaten
Toxic
Deadly

Eatensap (syrup, sugar) · seeds (cooked)

Sap is boiled into syrup and sugar. Not toxic to people, but wilted leaves of the related red maple (Acer rubrum) poison horses.

§3

Fruit & seed

Fruit: 2023-08-29 10 43 53 Immature fruit on a Sugar Maple along Aquetong Lane in the Mountainview section of Ewing Township, Mercer County, New Jersey

Fruit

Double samara

Ripens: Autumn

Paired winged seeds ('helicopters') joined at a U-shaped angle.

Seed

~2.5 cm with wing

Round seed at the base of a papery wing

Dispersal
Wind, spinning
Germination
Cold-stratify 60–90 days; sow in spring

Photographs from Wikimedia Commons under open licences; hover for the photographer, click for the file.

§4

How to grow it

Hardiness (USDA zones)

1
2
3
4
5
6
7
8
9
10
11
12
13

USDA 3–8. Survives winters down to about -40 °C.

Light
Full sun to partial shade
Water
Moderate
Soil
Deep, fertile, well-drained; dislikes road salt
Propagation
Seed
To harvest
Tap for syrup at about 25 cm diameter (30–40 years)
Climates
Temperate, Continental
  1. 1Stratify seed over winter in moist sand
  2. 2Sow in spring; protect seedlings from deer
  3. 3Plant in deep, moist, well-drained soil away from salted roads
  4. 4Tap in late winter when days are above freezing and nights below; boil the sap down to 66% sugar

Can it grow where you are?

or
§5

Where it lives

Recorded sightings

—

geo-referenced records in GBIF, from museums, herbaria and field observers.

Native range

Eastern Canada and north-eastern and central United States

Drag the globe to turn it. Dots are where records exist, not a range map; darker means more records.

§6

In the old herbals & bestiaries

No plate in the Source Library names this exact species, so these show its closest relatives as the old naturalists drew them: same genus, or the same kind of plant. Click a plate to read the page it came from, with translation.

§7

In the stacks

Searching the stacks…

Every page naming Acer saccharum in the Biodiversity Heritage Library →

§8

Marginalia

Anishinaabe, Haudenosaunee and other nations made maple sugar long before Europeans arrived, holding sugar camps each spring; the Haudenosaunee honour the sap run with a Maple Ceremony of thanksgiving. A stylised maple leaf has been on Canada's flag since 1965.

Curiosity

The 2012 'Great Canadian Maple Syrup Heist' saw about 3,000 tonnes of syrup, worth around C$18 million, stolen from a Quebec strategic reserve.

§9

Kinship

  1. kingdomPlantae
  2. ›phylumTracheophyta
  3. ›subphylumAngiospermae
  4. ›classMagnoliopsida
  5. ›orderSapindales
  6. ›familySapindaceae
  7. ›genusAcer
  8. ›sectionAcer
  9. ›complexAcer saccharum
Open its branch on the Wheel of Life →

Photographs: iNaturalist contributors under the licences shown. Records: GBIF.org. Historical plates: Source Library (CC BY-SA 4.0; originals public domain). Summary text: Nature Library editors and Wikipedia (CC BY-SA). Medicinal and edibility notes are historical and educational, not advice. iNaturalist taxon 52543.