OF THE EASTERN UNITED STATES 347 



thin hairy on upper surface and margin, the upper devoid of simple hairs 

 with the exception of the margin and petiole and mid-rib portions which 

 possess even fewer thin simple hairs than Myrica Carolinensis, yellow 

 and reddish, glandular on both surfaces, petiole flat on upper surface 

 and somewhat dilated at its junction with the stem, arrangement 2/5 

 spiral. 



First pair of foliage leaves: Opposite, obovate, cuneate, tricleft, 

 apex mucronate, base oblique, margin entire in lower 2/3, serrate in 

 upper 1/3, venation alternately pinnate-reticulate, secondary nerves 

 coming off at angle of 45°, short petiolate. 



Second pair of foliage leaves: Opposite, obovate-cuneate, tricleft, 

 apex mucronate, with terminal lobe entire or showing 1-2 serrations, 

 lateral lobes beginning to show 1 or 2 teeth, petiole very slightly longer 

 than that of first pair. 



Third leaf: Similar to second leaf, but petiole sHghtly longer and 

 lateral lobes distinctly 2 toothed. 



As we pass upward along the seedling axis we find the leaf margin 

 becoming more and more serrated until the highest leaves exhibit serra- 

 tions in their upper half, rarely in their upper 2/3. Occasionally we have 

 found one inecjuilateral leaf among the upper group. 



Myrica Carolinensis, Miller 

 (Plate 81. Fig. 2.) 



Primary root and hypoctyl similar to those of Myrica cerifera seedling. 

 Cotyledons, sessile, glabrous, opposite, obtuse and slightly emarginate 

 at the apex, somewhat clasping at the base, 5 mm. long x 3 mm. wide; 

 venation pinnate-reticulate with a distinct mid-rib. 



Epicotyl, erect, terete, excepting toward apex where it gradually 

 becomes triangular, brownish-green to green, hairy, yellow glandular, 

 soon becoming woody; first internode 6 1/2 mm. long, second 3 1/2 mm.; 

 third 2 mm. 



Leaves, simple, cauline or ramal, first pair opposite, the rest alternate, 

 petiolate, alternately pinnately nerved, slightly thinner than those of 

 M. cerifera, thin hairy on both upper and lower surface and margin, 

 yellow glandular on both surfaces, the glands on the lower surface 

 being more numerous than on the upper, petiole flat on upper surface, 

 slightly dilated at its insertion on the stem. Arrangement 2/5 spiral. 



First pair of foliage leaves: Opposite, obovate, tricleft, apex mucron- 

 ate, base obHque, margin entire in lower 2/3, serrate in upper 1/3, 

 venation alternately pinnate-reticulate, secondary veins coming off at 

 angle of 45°, short petiolate. 



