358 YOUNGKEN— ON THE MYRICACEAE 



2/3 bear either male or female catkins. The older branches are grayish 

 in color. The bark of the trunk is about 6 mm. thick and has a smooth 

 close light gray surface. The plant is frequently a shrub from .5 to 3 

 m. high sending up numerous crooked branches from near the ground. 

 The underground branches grow horizontally for long distances through 

 the soil and give off numerous tufts of suckers which arch upward. 



Myrica cerifera var. pumila, Michaux 

 A low much branched shrub 2-6 dm. tall, having erect or ascending 

 stems which are frequently tufted.^" The branchlets of first year's 

 growth are occasionally extremely hairy, frequently polished and shining. 

 Other features of the branches are similar to those of M. cerifera. 



Myrica Carolinensis, Miller 



A shrub attaining a height of 2 to 3 m. with crooked stems which 

 branch frequently. The recent shoots are greenish to dull reddish-brown 

 and are covered with yellow glands and shaggy white non-glandular 

 hairs, the former being more numerous toward the summit. The non- 

 glandular hairs are far more numerous than on similar shoots of M. ceri- 

 fera. Both leaf and flower buds are borne on these shoots, the former 

 always above the latter. The twigs are stiff at the ends of the shoots 

 of last year's growth. 



The branchlets of second year's growth are purplish-brown and show 

 numerous small whitish to grayish lenticels which vary from .5 to 1 

 mm. in length. These branchlets bear either staminate or pistillate 

 catkins in their lower 2/3. The fruit bearing axes persist on the stem 

 of the third year's growth. On January 31, 1915, the writer found them 

 also present on the stems of the 4th, 5th and 6th year of one plant growing 

 in the open. The older branches are ash-brown to ash-gray in color, 

 reticulately wrinkled and show numerous transversely elongated len- 

 ticels The underground branches form crooked scaly rhizomes which 

 creep through the soil in a horizontal manner and give off numerous lateral 

 branches. They send up tufts of spreading suckers at different nodes 

 which frequently serve to propagate the species. These suckers grow 

 downward and then upward in arcuate fashion. They are of a whitish 

 to reddish-white aspect when recently dug up. 



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

 A shrub rising to a height of 2 to 2.5 m. with very crooked branches, 

 the younger of which frequently appear stunted in habit. The shoots 



