Virtual Microscopy
Microscopy Primer
License Info
Image Use
Custom Photos
Partners
Site Info
Contact Us
Publications
Home

Visit Science,
Optics, & You


The Galleries:

Photo Gallery
Silicon Zoo
Pharmaceuticals
Chip Shots
Phytochemicals
DNA Gallery
Microscapes
Vitamins
Amino Acids
Birthstones
Religion Collection
Pesticides
Beershots
Cocktail Collection
Screen Savers
Win Wallpaper
Mac Wallpaper
Movie Gallery

The Pecan

The Pecan tree (Carya illinoensis; largest of the hickory trees) is a hardwood tree primarily found in the central and southern United States. The trunk reaches heights of 175 feet with diameters of 12 feet, but most cultivated specimens are much smaller. The sapwood is white to pale brown, while the heartwood is light brown, sometimes with a reddish tinge.


Cross Section


Radial Section


Tangential Section

Pecan trees are propagated by seed and require a very deep, fertile, and the moist soil typically found in the south. Pecan is one of the most important cultivated nuts of North America, grown primarily in Georgia and Texas, but also in most southern states and California. Pecan trees do not start producing pecans until they are 4 to 5 years old. The first pecan nursery was established in 1772 and from this small beginning, pecan production has grown into a multi-million dollar industry in the Southern states.

Pecan wood is used for flooring, woodenware and novelties. Other uses are for special products requiring a strong, tough, elastic wood such as sucker rods, picker sticks in cotton and silk mills, dowel pins, and skewers.

Microscopic examination of iron-alum hematoxylin and safranin stained thin sections (see the digital images presented above) reveals a semi-ringed porous wood with simple perforation plates and few vessels. Inter-vessel pits are 6 to 8 micrometers in diameter and orbicular to oval in shape. The rays are 1 to 5 seriate and homocellular to heterocellular.

BACK TO THE TREES COLLECTION

Questions or comments? Send us an email.
© 1995-2013 by Michael W. Davidson and The Florida State University. All Rights Reserved. No images, graphics, software, scripts, or applets may be reproduced or used in any manner without permission from the copyright holders. Use of this website means you agree to all of the Legal Terms and Conditions set forth by the owners.
This website is maintained by our
Graphics & Web Programming Team
in collaboration with Optical Microscopy at the
National High Magnetic Field Laboratory.
Last modification: Friday, Aug 01, 2003 at 11:43 AM
Access Count Since February 1, 1999: 25506
Microscopes provided exclusively by: