How to Identify Conifers - Page 4 of 10
By Ed Strauss, Washington (photos and content)

These two micro photographs, Figure 5 and Figure 6 (tangential view), are of a fossil from the Pine Family that is probably a "spruce type". Figure 5 is 40x magnification and Figure 6 is the same fossil at 100x. All Pityoxylon and thus Piceoxylon have some heterocellular rays. Heterocellular means more than one type of cells, in this case the small regular ray cells and the large resin cells.

Figure 5

Figure 6

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