... population of TAD. In contrast,seeds and cones were largest in the high Rif and smaller in the low lands. Precipitation in the high-altitude Rif is two-fold the precipitation in the lowlands. In fact, ... and weight), seed wings (length and width) and needles (length,width, thickness and the number of stomata rows on the dorsal and convex faces of the needle) were measured in 232 trees. A PrincipalComponent ... stands are listed in Table I. Trees were chosen randomly, withTable I. Location and geographic characteristics of nine native populations of Pinus pinaster Ait. in Morocco. Tmax and Tmin stand...