Ring porer

Fraxinus excelsior wood (ash), cross-section at 25x magnification, with large-lumen early wood and narrow-lumen latewood vessels

Ring-pored woods ( ring- pores) are woods in which large vessels (trachea) are formed in spring (early wood) . This group includes almost all heartwood trees , such as ash , hickory , elm and oak . This arrangement of the conductive vessels is found almost exclusively in species from northern temperate latitudes, with teak being an exception . In spring, the vessels form more quickly than with scattered-pored wood , so the water flow is about ten times as high.

Individual evidence

1. ↑ ^{a b} Louis Edgar Andés: Wood and Marble Painting ...: 22 panels ... A. Hartleben, 1901, p. 15.
2. ^ Wilhelm Nultsch: Microscopic-Botanical Practical Course for Beginners. Georg Thieme Verlag, Stuttgart 2001, ISBN 3-13-440310-2 , p. 157.
3. ^ Richter, HG, and Dallwitz, MJ 2000 onwards. Commercial timbers: descriptions, illustrations, identification, and information retrieval. In English, French, German, Portuguese, and Spanish. Version: 25th June 2009. http://delta-intkey.com . Retrieved January 10, 2016
4. ↑ Wood of the angiosperms on: biologie.uni-hamburg.de ( Memento from October 22, 2010 in the Internet Archive )