Maple

Description

Overall view of small maple in autumn in a grassy open field.

Maple (Acer spp./Aceraceae). The genus Acer (Maples) is comprised of about 120 species native to temperate and sub tropical regions of the globe. Maples attain heights of 120 ft with diameters of 3 ft. Some large, trees in natural forests may have clear trunks of 60 ft. The woods can be separated into Soft Maple and Hard Maple groups based on hardness and microscopic ray width. Maple sapwood is white to light brown, while the heartwood is a light red-brown. The species in the Hard Maple group have fine, uniform texture that is easy to work w/ power tools. It is heavy, strong, stiff, hard, and resistant to shock, and it has large shrinkage. Sugar Maple is generally straight grained but the grain also occurs as “birds-eye,” “curly,” and “fiddleback” grain. The wood of Hard Maple is hard and heavy and the color of the wood can range from white to reddish brown. It has a fine, uniform texture that turns well and is resistant to shock and abrasion. The grain can be straight, curly, wavy or bird's eye. Wood of the Soft Maple group is similar to wood of the Hard Maple group, but it is less heavy, strong and hard. Maple wood works well with most tools under most applications. It is rated as slightly or nonresistant to heartwood decay and is moderately resistant to penetration with preservatives. It is used for bowling alleys, bowling pins, boxes and crates, crossties, cutting blocks, dance floors, distillation, flooring, furniture, handles, lumber, novelties, pallets, paper pulp, piano frames, pulpwood, shoe lasts, spools and bobbins, turnery, veneer, and woodenware.

Soft Maple Group Hard Maple Group
Eastern North America Eastern North America
Common Name Scientific Name Common Name Scientific Name
Red Maple A. rubrum Sugar Maple A. saccharum
Silver Maple A. saccharinum Black Maple A. nigrum
Maple leaves on a branch.

Tech Sheet

https://research.fs.usda.gov/silvics/red-maple

https://research.fs.usda.gov/silvics/silver-maple

https://research.fs.usda.gov/silvics/sugar-maple

https://research.fs.usda.gov/silvics/black-maple

Characteristics

Characteristics found in the Maple (Acer spp.):

  • Diffuse porous
  • Spirals on vessels Fine
  • I/V pits medium (8-12)
  • Rays 1-8 seriate & homocellular
  • Hard Maple Group with few/no rays 2-3 wide

Slides (Click on each image to view a larger image)

WOOD SLIDES

Hard Maple

Microscope slide of tangential section of Hard Maple wood. Arrows point to the spirals and rays and inner vessel pitting.

Tangential section of Hard Maple Group (Acer sp.) showing a preponderance of uniseriate rays and wide rays, 5 – 6 seriate.

Soft Maple

Microscope slide of tangential section of soft Maplewood. Arrows point to the rays, fibers, spirals, and vessels.

Tangential section of Soft Maple Group (Acer sp.) showing many rays that are 2 – 3 seriate.

CHARCOAL SLIDES

Hard Maple

Soft Maple