Search in gallery Macerated wood of Pinus - Large (68 Kb) - Scroll down   to information Without labels Legend: 1  large pit 2  bordered pit     English name: Pine Scientific name: Pinus sp. Familia: Pinaceae Classis: Coniferopsida Phylum: Gymnospermae Regnum: Plantae Mutual contact between tracheids is enabled by bordered pits, while contact between parenchyma cells and tracheids is provided by special large pits.

http://www.vcbio.science.ru.nl/en/image-gallery/show/labels/PL0158/print/