Pits: Face View

Bordered Pits
tracheary elements
Arrows indicate simple perforation plates.

Simple Pits
xylem fibers

Pits: Cross Section

v.m., xylem vessel member; r.p., xylem ray parenchyma; fxylem fiber.

The arrows indicate simple perforation plates. See below for enlargement of bordered and simple pits.

Simple Pits (see arrows) between fibers and sclerified parenchyma (p) cells.

Bordered pits In vessel member wall (see circle). Also note the simple pits between sclerified parenchyma (s.p.) cells. The arrow indicates what remains of the cross wall between two vessel members.

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© Thomas L. Rost 1996
Section of Plant Biology Division of Biological Sciences