348 YOUNGKEN— ON THE MYRICACEAE 



Second foliage leaf: Alternate with first pair and third leaf, pinnately 

 tricleft with terminal lobe entire or showing one serration, lateral lobes 

 beginning to show two teeth. 



Third foliage leaf: Alternate with second and fourth, petiole slightly 

 longer than second, lateral lobes distinctly two-toothed. 



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

 gradually becoming more and more serrate until the highest leaves are 

 generally serrate in their upper 1/2. We also find that the number of 

 glandular hairs on the upper surface gradually diminishes until some 

 of the highermost inserted leaves are entirely devoid of them on this 

 area. 



Myrica Macfarlanei, (Youngken) : (M. cerifera x M. Carolinensis) 



(Plate 81. Fig. 3) 



Primary root and hypocofeyl similar to those of M. cerifera and M. 

 Carolinensis. Epicotyl, erect, terete excepting toward apex, where it 

 becomes triangular, brownish-green to green, hairy, yellow and red 

 glandular soon becoming woody and branched; first internode 5 mm. long, 

 second 3 1/2 mm.; third 1.75 mm. 



Leaves simple, cauline or ramal, 1st pair opposite, the rest alternate, 

 venation pinnate-reticulate, secondary veins coming off from mid-rib 

 at angle of 45°, about the same texture as those of M. cerifera, petiolate, 

 thin hairy on margin and upper surface over veins, yellow to red glandu- 

 lar, but glandular hairs more frequent on lower than upper surface, 

 and yellow glands alone present on upper surface, petiole fiat on upper 

 surface and showing numerous hairs, somewhat dilated at its insertion 

 on the stem. Arrangement 2/5 spiral. While the leaves of the seedling 

 hybrid remain green during the summer and early autumn, they gradually 

 become discolored during the late autumn and winter, most of them re- 

 maining on the stem and branches until the new leaves bud forth in the 

 spring. 



Of all the hybrid seedlings examined at Palermo, March 21st, 1915, 

 we found most of the leaves present and having a reddish brown color; 

 a few were only partly discolored. 



First pair of foliage leaves: Opposite, obovate-cuneate to rarely 

 orbicular in outline, tricleft, apex mucronate, base more or less obHque 

 to seldom rounded, margin entire in lower ^, serrate in upper 3^, vena- 

 tion alternately pinnate-reticulate, extremely short petiolate. 



Second foliage leaf: Alternate with first pair and third leaf, obovate- 

 cuneate, apex either 3-5 toothed or 3 lobed, each lobe being mucronate 



