COM PARATIVE INVESTIGATION O F W OOD STRU C TU R E O F Pinus nigra L. VARIETIES (P. nigra var. pallasiana-P. nigra var. pyramidata)

Sonıe anatomical features of P. nigra varieties grown nearby Kütahya, Tlırkey were comparatively investigated. The mean tracheid length in var. pallasiana 2930 pm, in var. pyramidata'An 3296 pm. Tracheid number in per mm2 in var. pallasiana 833, in var. pyramidata 694. Earlyvvood tracheid mean tangential diameter var. pallasiana 35 pm and 42 pm in var. pyramidata. Rays heterogen, uniseri, genearely 3-10 cells height in two varieties. Cross-field pits large, window-Iike.